ANSYS, Inc. Release Notes
ANSYS, Inc.
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Release 12.1
November 2009
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Table of Contents
1. Global ...................................................................................................................................................... 1
1.1. Installation ....................................................................................................................................... 1
1.2. Licensing .......................................................................................................................................... 1
2. ANSYS Mechanical APDL ......................................................................................................................... 3
2.1. Structural ......................................................................................................................................... 3
2.1.1. Linear Dynamics ...................................................................................................................... 3
2.1.1.1. Modal Assurance Criterion Performance Enhancements ................................................... 3
2.1.1.2. Animated Sequence Support Enhancements ................................................................... 3
2.1.1.3. Simplorer Interface .......................................................................................................... 4
2.1.1.4. CMOMEGA, CMDOMEGA, and CMACEL Maximum Component Enhancements ............... 4
2.2. Low-Frequency Electromagnetics ..................................................................................................... 4
2.2.1. New Element for Modeling Planar and Axisymmetric Magnetic Fields ....................................... 4
2.3. Thermal ............................................................................................................................................ 4
2.3.1. Convection Analysis ................................................................................................................. 4
2.4. Solvers ............................................................................................................................................. 5
2.4.1. High Performance Computing Enhancements .......................................................................... 5
2.4.2. Distributed ANSYS Supports Intel MPI ....................................................................................... 5
2.4.3. Distributed ANSYS Supports Prestressed Modal Cyclic Symmetry .............................................. 5
2.4.4. PCG Lanczos (LANPCG) Solver Enhancements ........................................................................... 5
2.4.5. Distributed Sparse (DSPARSE) Solver Enhancements ................................................................. 5
2.5. Commands ....................................................................................................................................... 5
2.5.1. New Commands ...................................................................................................................... 6
2.5.2. Modified Commands ................................................................................................................ 6
2.6. Elements .......................................................................................................................................... 6
2.6.1. New Elements .......................................................................................................................... 6
2.6.2. Modified Elements ................................................................................................................... 6
2.7. Documentation ................................................................................................................................ 6
2.7.1. New Technology Demonstration Guide ....................................................................................... 7
2.7.2. Spin Softening Documentation Updates ................................................................................. 10
2.7.3. Documentation Updates for Programmers .............................................................................. 10
2.7.3.1. Routines and Functions Updated ................................................................................... 10
2.7.3.2. Creating a Dynamic-Link (DLL) Library ........................................................................... 10
2.8. Known Incompatibilities ................................................................................................................. 10
2.8.1. Argument List Changed for User Subroutine usrsurf116 .......................................................... 10
2.9. The ANSYS Customer Portal ............................................................................................................ 10
3. ANSYS Workbench ................................................................................................................................ 11
3.1. Advisories ....................................................................................................................................... 11
3.2. ANSYS Workbench 12.1 ................................................................................................................... 11
3.2.1. ANSYS Workbench 12.1 Linux Support .................................................................................... 11
3.2.1.1. Supported Platforms, Applications, and CAD Products .................................................... 11
3.2.1.2. Linux Behavior ............................................................................................................... 12
3.2.1.3. Linux Restrictions .......................................................................................................... 12
3.2.2. Journaling and Scripting in ANSYS Workbench ....................................................................... 12
3.2.3. Other ANSYS Workbench 12.1 Enhancements ......................................................................... 13
3.3. DesignModeler Release Notes ......................................................................................................... 14
3.3.1. Advisories .............................................................................................................................. 14
3.3.2. Feature Enhancements ........................................................................................................... 14
3.3.3. Model Enhancements ............................................................................................................. 15
3.3.4. CAD Enhancements ............................................................................................................... 16
3.3.5. Incompatibilities and Changes in Product Behavior from Previous Releases ............................. 17
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of ANSYS, Inc. and its subsidiaries and affiliates.
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ANSYS, Inc. Release Notes
3.4.TurboSystem Release Notes ............................................................................................................. 17
3.4.1. BladeGen ............................................................................................................................... 17
3.4.1.1. BladeGen New Features and Enhancements ................................................................... 18
3.4.1.2. Known Limitations Applicable to BladeGen .................................................................... 18
3.4.2. BladeEditor ............................................................................................................................ 18
3.4.2.1. BladeEditor New Features and Enhancements ................................................................ 18
3.4.2.2. Known Limitations Applicable to BladeEditor ................................................................. 18
3.4.3. Vista TF .................................................................................................................................. 19
3.5. ANSYS Icepak Release Notes ........................................................................................................... 20
3.5.1. New and Modified Features in ANSYS Icepak 12.1 ................................................................... 20
3.5.2. Known Limitations of ANSYS Icepak 12.1 ................................................................................ 20
3.6. CFX-Mesh Release Notes ................................................................................................................. 21
3.7. Meshing Application Release Notes ................................................................................................. 21
3.8. Mechanical Application Release Notes ............................................................................................. 24
3.9. FE Modeler Release Notes ............................................................................................................... 27
3.10. DesignXplorer Release Notes ......................................................................................................... 29
3.11. Engineering Data Workspace Release Notes ................................................................................... 30
3.12. EKM Desktop ................................................................................................................................ 30
3.13. ANSYS AQWA ................................................................................................................................ 31
4. ANSYS ASAS, ANSYS AQWA, FEMGV ..................................................................................................... 33
4.1. ANSYS ASAS ................................................................................................................................... 33
4.2. ANSYS ASAS BEAMCHECK ............................................................................................................... 33
4.3. ANSYS AQWA .................................................................................................................................. 34
4.4. FEMGV ........................................................................................................................................... 35
5. AUTODYN .............................................................................................................................................. 37
5.1. Introduction ................................................................................................................................... 37
5.2. ANSYS AUTODYN Enhancements .................................................................................................... 37
5.2.1. Efficiency Improvements ........................................................................................................ 37
5.2.2. Bonded Connections With Line Bodies .................................................................................... 37
5.2.3. Bonded Connections With DCR Contact Method ..................................................................... 37
5.2.4. 2D Unstructured Volume Solvers ............................................................................................ 37
5.2.5. 2D Unstructured Interaction ................................................................................................... 38
5.2.6. 2D Rigid Materials .................................................................................................................. 38
5.2.7. Parallel 3D Multi-Material Euler Coupled to Lagrange .............................................................. 38
5.2.8. HP-MPI Message Passing for Supported Windows Platforms .................................................... 38
5.3. Explicit Dynamics (ANSYS) System Enhancements ........................................................................... 38
5.3.1. Pre-Stress Initial Condition ...................................................................................................... 38
5.3.2. Support for Cylindrical Coordinate Systems ............................................................................ 38
5.3.3. Hydrostatic Pressure Load ...................................................................................................... 38
5.3.4. Expressions for Pressure and Velocity Boundary Conditions ..................................................... 39
5.3.5. Bonded Connections with Line Bodies .................................................................................... 39
5.3.6. Bonded Connections with DCR Contact Method ..................................................................... 39
5.3.7. Analysis Settings .................................................................................................................... 39
5.3.8. Post Processing ...................................................................................................................... 39
6. ANSYS CFX ............................................................................................................................................ 41
6.1. New Features and Enhancements .................................................................................................... 41
6.1.1. ANSYS CFX in ANSYS Workbench ............................................................................................ 41
6.1.2. ANSYS CFX in General ............................................................................................................ 41
6.1.3. ANSYS CFX Documentation .................................................................................................... 41
6.1.4. ANSYS CFX-Pre ....................................................................................................................... 42
6.1.5. ANSYS CFX-Solver .................................................................................................................. 42
6.1.6. ANSYS CFD-Post ..................................................................................................................... 42
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ANSYS, Inc. Release Notes
6.2. Incompatibilities ............................................................................................................................. 42
6.2.1. CFX-Pre .................................................................................................................................. 42
6.2.2. CFX-Solver Manager ............................................................................................................... 42
6.2.2.1. Interpolation with Moving Mesh .................................................................................... 42
6.2.3. ANSYS CFX-Solver .................................................................................................................. 42
6.2.3.1. Multiphase .................................................................................................................... 43
6.2.3.2. GGI Interfaces ................................................................................................................ 43
6.2.3.3. Particle Transport .......................................................................................................... 43
6.2.3.4. Combustion, Radiation and Material Properties .............................................................. 43
6.2.3.5. Turbulence .................................................................................................................... 43
6.2.3.6. Boundary Conditions ..................................................................................................... 44
6.2.3.7. Miscellaneous ................................................................................................................ 44
6.2.4. CFD-Post ................................................................................................................................ 44
6.3. Known Limitations .......................................................................................................................... 45
7. ANSYS TurboGrid .................................................................................................................................. 47
8. ANSYS ICEM CFD ................................................................................................................................... 49
8.1. Highlights of ANSYS ICEM CFD 12.1 ................................................................................................. 49
8.2. Key New Features/Improvements .................................................................................................... 49
8.2.1. Workbench Readers ............................................................................................................... 49
8.2.2. Interface Improvements ......................................................................................................... 49
8.2.3. Linux Support ........................................................................................................................ 50
8.2.4. Tetra ...................................................................................................................................... 50
8.2.5. Prism ..................................................................................................................................... 50
8.2.6. Hexa ...................................................................................................................................... 50
8.2.7. Multi-zone ............................................................................................................................. 51
8.2.8. BF-Cart .................................................................................................................................. 51
8.2.9. Mesh Editing .......................................................................................................................... 51
8.2.10. Output ................................................................................................................................. 52
8.2.11. General ................................................................................................................................ 52
8.3. Known Incompatibilities ................................................................................................................. 52
8.4. Documentation .............................................................................................................................. 53
8.4.1. Tutorials ................................................................................................................................. 53
8.4.2. Demo Room ........................................................................................................................... 53
9. ANSYS CFD-Post .................................................................................................................................... 55
9.1. New Features and Enhancements .................................................................................................... 55
9.2. Incompatibilities ............................................................................................................................. 55
9.3. Known Limitations .......................................................................................................................... 55
10. ANSYS FLUENT .................................................................................................................................... 57
10.1. Introduction ................................................................................................................................. 57
10.1.1. Installation Procedures for FLUENT (Windows and UNIX/Linux Platforms) .............................. 57
10.2. New Features ................................................................................................................................ 57
10.3. Supported Platforms ..................................................................................................................... 58
10.4. Known Limitations ........................................................................................................................ 58
10.5. Limitations That No Longer Apply in FLUENT 12.1 .......................................................................... 58
10.6. Updates Affecting Code Behavior .................................................................................................. 58
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of ANSYS, Inc. and its subsidiaries and affiliates.
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Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
Chapter 1: Global
The following installation and licensing changes apply to all ANSYS, Inc. products at the 12.1 release. Be sure
to read the Release Notes for your individual product(s) for additional installation and licensing changes
specific to your product(s).
If you would like to access a PDF file of the ANSYS Release 12.0 Release Notes, click here.
1.1. Installation
•
At Release 12.1, ANSYS Workbench is available on Linux 32 and Linux x64 platforms. Please see ANSYS
Workbench Linux Restrictions for information on restrictions for using ANSYS Workbench on Linux.
•
The Install Required Prerequisites option of the installation launcher on Windows now evaluates the
software on your system and installs only those prerequisites that you do not already have installed.
You should always choose this option before choosing to install the products on Windows machines.
•
The installation launcher on Windows has added options for Mechanical APDL (ANSYS) to install HP MPI
and Intel MPI for running Distributed Mechanical APDL (ANSYS). See the ANSYS, Inc. Windows Installation
Guide and the Distributed ANSYS Guide for more information.
•
You can now run both the installation and the uninstall processes silently. See the ANSYS, Inc. Installation
Guide for your platform for detailed instructions on using the -silent option.
•
Many ANSYS, Inc. products, including ANSYS Workbench, are available in English, German, and French
on Windows platforms at Release 12.1. Please see the ANSYS, Inc. Windows Installation Guide and your
products' help for information on using a translated version.
1.2. Licensing
•
At ANSYS Release 12.1, the license manager daemons (lmgrd and ansyslmd) have been upgraded
to FLEXlm 10.8.8 (FLEXnet 10.8.8). You must use this version of the license manager with ANSYS 12.1.
•
At ANSYS Release 12.1, the ANSYS Licensing Interconnect (a component of the ANSYS License Manager)
was upgraded. You must upgrade to the 12.1 version of the ANSYS License Manager for ANSYS 12.1
products to run.
•
ANSYS, Inc. now offers physics-neutral HPC licenses that can be used across most ANSYS, Inc. applications.
Please see HPC Licensing in the ANSYS, Inc. Licensing Guide for detailed information on using the new
ANSYS HPC and ANSYS HPC Pack licenses.
•
ANSYS POLYFLOW and ANSYS Icepak work with the ANSYS, Inc. License Manager at Release 12.1. You
should be able to continue using your legacy licensing for these products, but we recommend upgrading
to the ANSYS, Inc. License Manager.
•
VT Accelerator technology is now enabled in Mechanical APDL, with a valid Structural, Mechanical,
Professional, or Multiphysics solver license. Beginning with Release 12.1, you no longer need an ANSYS
HPC license to enable VT Accelerator.
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
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Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
Chapter 2: ANSYS Mechanical APDL
This release of the Mechanical APDL application contains all of the capabilities from previous releases plus
several new features and enhancements. Areas where you will find changes and new capabilities include
the following:
2.1. Structural
2.2. Low-Frequency Electromagnetics
2.3.Thermal
2.4. Solvers
2.5. Commands
2.6. Elements
2.7. Documentation
2.8. Known Incompatibilities
2.9.The ANSYS Customer Portal
Also see The ANSYS Customer Portal (p. 10) for important information about this release.
For information about changes to the ANSYS Workbench Products, see the ANSYS Workbench Products Release
Notes.
2.1. Structural
Release 12.1 includes the following new features and enhancements for structural analyses:
2.1.1. Linear Dynamics
This release offers the following improvements for structural analyses involving linear dynamics:
2.1.1.1. Modal Assurance Criterion Performance Enhancements
The performance of Modal Assurance Criterion (MAC), which matches nodal solutions from two results
(RSTMAC), has been enhanced. The code segment that checks nodal coordinate locations between the two
.rst files has been redesigned to improve performance.
2.1.1.2. Animated Sequence Support Enhancements
The ANHARM command can now provide the time transient animated sequence of time harmonic results
from complex mode shapes for all complex eigensolvers. Supported eigensolvers include MODOPT, QRDAMP,
DAMP, and UNSYM.
An option has been added to ANHARM to remove the amplitude decay or growth component in the animations. The command argument NPERIOD specifies the second period number for animating complex modes.
If NPERIOD = -1, animation occurs without the decay or growth component.
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of ANSYS, Inc. and its subsidiaries and affiliates.
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Chapter 2: ANSYS Mechanical APDL
2.1.1.3. Simplorer Interface
The state-space matrices from a structural model can be exported to Simplorer to simulate mechatronics
systems. The reduced model is based on a modal analysis. The inputs and outputs are defined through load
vectors or table array parameters. The state-space matrices file (file.spm) is generated in postprocessing
using the new SPMWRITE command. This file can be imported into Simporer to automatically create a
mechanical component.
For more information, see "State-Space Matrices Export" in the Advanced Analysis Techniques Guide.
2.1.1.4. CMOMEGA, CMDOMEGA, and CMACEL Maximum Component Enhancements
The upper limit of 100 components applicable for CMOMEGA, CMDOMEGA, and CMACEL has been removed.
An unlimited number of components can now be used with these component based inertia load application
commands.
2.2. Low-Frequency Electromagnetics
Release 12.1 includes the following enhancement for low-frequency electromagnetic analyses:
2.2.1. New Element for Modeling Planar and Axisymmetric Magnetic Fields
A new 2-D quadrilateral element, PLANE233, is now available for modeling planar and axisymmetric magnetic
fields. It is defined by eight or six nodes and has a thickness input with the planar geometry or a fraction
of the 360 degree basis with the axisymmetric geometry.
The element has up to two degrees of freedom per node: Z-component of the magnetic vector potential
(AZ) and electric scalar potential (VOLT). It is applicable to static, time-harmonic, and time-transient electromagnetic analyses.
In static and transient analyses, the element can be used to model nonlinear magnetic materials and permanent magnets. Harmonic electromagnetic analyses include both the eddy currents and the displacement
current effects.
The true electric potential degree of freedom in electromagnetic analyses allows for coupling with discrete
circuit elements and solid low-frequency electric elements. The element also has the legacy option to work
with time-integrated electric potential.
In addition to in-plane magnetic and through-the-thickness electric fields, the element calculates magnetic
forces, Joule heat, and electromagnetic energy.
The element analysis options and magnetic force calculation methods are consistent with those of SOLID236
and SOLID237.
2.3. Thermal
Release 12.1 includes the following enhancement for thermal analyses:
2.3.1. Convection Analysis
A two-extra-node option is now available for 3-D thermal surface effect element SURF152 (KEYOPT(5) = 2).
The new option offers greater accuracy than the one-extra-node option.
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Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
2.5. Commands
For higher thermal accuracy in fluid flows, two new options have been added to FLUID116 (KEYOPT(9) = 1
and 2): central difference and exponential schemes. Three methods are available for mapping the FLUID116
nodes to the SURF152 elements: minimum centroid distance method, projection method, and hybrid
method (MSTOLE).
For more information, see Using the Surface-Effect Elements in the Thermal Analysis Guide.
2.4. Solvers
Release 12.1 includes the following new enhancements that improve solution procedures and features.
2.4.1. High Performance Computing Enhancements
2.4.2. Distributed ANSYS Supports Intel MPI
2.4.3. Distributed ANSYS Supports Prestressed Modal Cyclic Symmetry
2.4.4. PCG Lanczos (LANPCG) Solver Enhancements
2.4.5. Distributed Sparse (DSPARSE) Solver Enhancements
2.4.1. High Performance Computing Enhancements
To take full advantage of multicore desktop systems, the default shared-memory parallel capability (which
uses two CPU processors by default) has been extended to operations of element stiffness generation. For
many applications (such as linear static or stress expansions), a savings of up to 50 percent in elapsed time
is realized for element generation.
2.4.2. Distributed ANSYS Supports Intel MPI
In addition to the default HP-MPI, Distributed ANSYS now supports Intel MPI on Linux and Windows platforms,
including Windows 32-bit and 64-bit systems.
2.4.3. Distributed ANSYS Supports Prestressed Modal Cyclic Symmetry
Distributed ANSYS now supports prestressed modal cyclic symmetry analysis. Previously, it supported modal
cyclic symmetry analysis without prestress effects.
2.4.4. PCG Lanczos (LANPCG) Solver Enhancements
The PCG Lanzcos solver has been improved to significantly reduce the amount of I/O performed.
2.4.5. Distributed Sparse (DSPARSE) Solver Enhancements
The parallel ordering option (DSPOPTION,PARORDER) for the distributed sparse (DSPARSE) solver has been
significantly improved in terms of both performance and its ability to perform equation-ordering operations.
2.5. Commands
This section describes changes to commands at Release 12.1.
Some commands are not accessible from menus. The documentation for each command indicates whether
or not a menu path is available for that command operation. For a list of commands not available from
within the GUI, see Menu-Inaccessible Commands in the Command Reference.
2.5.1. New Commands
2.5.2. Modified Commands
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
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Chapter 2: ANSYS Mechanical APDL
2.5.1. New Commands
The following new commands are available in this release:
MSTOLE -- Adds two extra nodes from FLUID116 elements to SURF152 elements for convection analyses.
SPMWRITE -- Calculates the state-space matrices and writes them to the .spm file.
2.5.2. Modified Commands
The following commands have been enhanced in this release:
ANHARM -- Generates a time-transient animated sequence of time-harmonic results or complex mode
shapes. The command can now provide the time-transient animated sequence of time-harmonic results
from complex mode shapes for all complex eigensolvers. A new NPERIOD argument has also been added
to remove the amplitude decay or growth component in the animations.
CMOMEGA, CMDOMEGA, and CMACEL -- The upper limit of 100 components applicable for each of these
component-based inertia-load-application commands has been removed. An unlimited number of components
can now be used.
2.6. Elements
This section describes changes to elements at Release 12.1.
Some elements are not available from within the GUI. For a list of those elements, see GUI-Inaccessible Elements in the Element Reference.
2.6.1. New Elements
2.6.2. Modified Elements
2.6.1. New Elements
The following new element is available in this release:
PLANE233 -- This 2-D quadrilateral element is available for modeling planar and axisymmetric magnetic
fields. It has up to two degrees of freedom per node: Z-component of the magnetic vector potential (AZ),
and electric scalar potential (VOLT). The element is applicable to a static, time-harmonic, and time-transient
electromagnetic analyses.
2.6.2. Modified Elements
The following elements have been enhanced in this release:
SURF152 -- For improved accuracy in convection analyses, this 3-D surface effect element has a new option
for adding two extra nodes from FLUID116 elements.
FLUID116 -- For higher thermal accuracy in fluid flows, two new options have been added to this thermalflow element (KEYOPT(9) = 1 and 2): central difference and exponential schemes.
2.7. Documentation
The 12.1 release includes the following product documentation enhancements and improvements:
2.7.1. New Technology Demonstration Guide
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Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
2.7.1. New Technology Demonstration Guide
2.7.2. Spin Softening Documentation Updates
2.7.3. Documentation Updates for Programmers
2.7.1. New Technology Demonstration Guide
The 12.1 release introduces the Technology Demonstration Guide.
The purpose of the new guide is to encourage you to take advantage of the extraordinarily broad simulation
capabilities of ANSYS Mechanical APDL. The guide showcases the features and effectiveness of Mechanical
APDL by presenting a series of analysis problems from a variety of engineering disciplines.
The problems are more substantive and complex than examples found in the standard documentation set.
The guide thoroughly examines the physics involved with each problem and the considerations necessary
for translating problems into numerical models. Approximation issues, accuracy considerations, and recommended practices are discussed.
How Problems Are Presented
Each problem description provides information about the nature and physical characteristics of the problem,
specific modeling techniques, material properties, boundary conditions and loading, analysis details and
solution controls.
A comprehensive results and discussion section carefully examines analysis results (often comparing them
to baseline or “known good” results using more traditional analysis methods), and illustrates why specific
strategies and methods were chosen.
Each problem concludes with valuable hints and recommendations for performing a similar type of analysis.
In many cases, references are provided for additional background information. Each example presented can
therefore serve as a template for setting up similar types of simulations.
Your Results May Vary
A 64-bit Linux system was used for the problems described in the guide. The results shown for each problem
may differ from those that you obtain depending upon the computer hardware and operating system platforms in use at your site.
Problem Summary
The following analysis demonstration problems are available:
Nonlinear Analysis of a 2-D Hyperelastic
Seal Using Rezoning
A nonlinear analysis of a 2-D hyperelastic seal assembly using
manual rezoning with remeshing via the element-splitting
method.The problem shows how multiple vertical rezoning steps
can be used to ensure convergence and completion of an analysis.
Nonlinear Transient Analysis of a Camshaft Assembly
Shows how to easily set up and perform an analysis involving
both axisymmetric and nonaxisymmetric components.The
problem demonstrates how modeling with general axisymmetric
element technology can reduce computational resources significantly while maintaining the same degree of accuracy as a simulation using a full 3-D model.
Simulation of a Lumbar Motion Segment
Uses coupled pore-pressure element technology to study the
creep response of a lumbar motion segment under compression.
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of ANSYS, Inc. and its subsidiaries and affiliates.
7
Chapter 2: ANSYS Mechanical APDL
The simulation reveals the interaction between the solid phase
and the fluid phase in soft tissues.
Fluid-Pressure-Penetration Analysis of a
Sealing System
Studies fluid-pressure-penetration effects on a sealing system.
The use of seals is primarily to prevent the transfer of fluid (liquid,
solid, or gas) between two or more regions.
Delamination of a Stiffened Composite
Panel Under a Compressive Load
Uses solid-shell element technology to model a layered-composite
structure.The problem simulates interface delamination through
the debonding capability of contact elements.
Rocket Nozzle Extension Simulation
Demonstrates current structural-shell element technology and
illustrates how it can be used to accurately model the orthotropic
thermal expansion in curved-shell structures. Section offsets are
applied when connecting shell-to-shell or to shell-to-other element types.
Nuclear Piping System Under Seismic
Loading
Demonstrates the advantages of elbow element technology over
traditional shell and pipe element technology for modeling pipe
bends in a typical nuclear piping system.
Brake Squeal Analysis
Shows how to solve a brake squeal problem. Three analysis
methods are highlighted: linear non-prestressed modal, partial
nonlinear prestressed modal, and full nonlinear prestressed
modal.The problem demonstrates sliding frictional contact and
uses complex eigensolvers to predict unstable modes.
Calibrating and Validating a Hyperelastic
Constitutive Model
Demonstrates how hyperelastic curve-fitting is used to select
constitutive model parameters to fit experimental data. Several
issues influencing the accuracy of the curve fit are discussed.
Validation of the resulting constitutive model is demonstrated by
comparison with a tension-torsion experiment.
Reliability Study of a Composite Overwrapped Pressure Vessel
A reliability study of a composite overwrapped pressure vessel
(COPV).The model uses reinforcing fibers in a layered composite.
A finite-element simulation of a COPV is performed first to gain
insight into its mechanical behaviors, then simulation results are
processed using failure analysis to determine the most vulnerable
layer.The problem generates linearized stress output for pressurevessel design optimization and code compliance.
Dynamic Simulation of a Nuclear Piping
System Using RSA Methods
A problem that accounts for the missing-mass effect and rigidresponse effects in a spectrum analysis, and how including those
effects improves results accuracy as compared to full-transient
analysis results.The problem uses a piping system model from
an actual nuclear power plant.
Ring-Gear Forging Simulation with
Rezoning
Demonstrates the efficiency and usefulness of rezoning in a simulation of metal-forming processes. Rezoning facilitates the convergence of a nonlinear finite element simulation in which excessive element distortion occurs.
Thermal Stress Analysis of a Cooled Turbine Blade
Shows how to easily set up and perform a thermal-stress analysis
of a cooled turbine blade.The problem uses surface-effect capabilities to simulate convection loading on solid regions, and onedimensional fluid-flow capabilities to obtain a highly accurate
thermal solution for convection loading.
Evaluation of Mixed-Mode Stress-Intensity
Factors for 3-D Surface Flaws
Demonstrates the linear elastic fracture mechanics of 3-D structures.The problem shows how fracture mechanics can be used
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2.7.1. New Technology Demonstration Guide
to evaluate mixed-mode stress-intensity factors and J-integrals.
Analyses of a simple semicircular surface flaw in a rectangular
block and a warped flaw along a tubular joint are discussed.
Cyclic Symmetry Analysis of a Centrifugal
Impeller Model
Uses a centrifugal impeller blade to show how to perform cyclic
symmetry modal and harmonic analyses.The problem illustrates
cyclic modeling methods and solution approaches.
Transient Dynamic Analysis of a DiggerArm Assembly
A digger-arm assembly problem demonstrating a transient dynamic analysis of a multibody system.The problem shows how
to model joints and rigid/flexible parts, mitigate overconstraints,
and represent flexible parts using component mode synthesis
(CMS).
Dynamic Simulation of a Printed Circuit
Board Assembly Using Modal Analysis
Methods
Uses residual vectors to improve the solution accuracy in modal
subspace based analysis methods, such as modal superposition
and power spectral density (PSD) analyses.The problem includes
a study of the computational efficiency of the results-expansion
procedure used to obtain the full model solution.
Impact of a Metal Bar on a Rigid Wall
An impact simulation using a model of a 3-D metal bar hitting
a rigid wall. The problem shows the advantages of using impact
constraints for modeling contact in a nonlinear transient dynamic analysis. Several combinations of available time-integration
methods and contact algorithms are also investigated, using
different material models to show how various choices affect
the performance and accuracy of the finite-element solution
of impact problems.
Buckling and Post-Buckling Analysis of a
Ring-Stiffened Cylinder Using Nonlinear
Stabilization
A nonlinear buckling and post-buckling analysis using nonlinear
stabilization.The problem uses a stiffened cylinder subjected to
uniform external pressure to demonstrate how to find the nonlinear buckling loads, achieve convergence at the post-buckling
stage, and interpret the results.
Rotordynamics of a Shaft Assembly Based
Representative Model of a Nelson-Vaugh
Rotor
A rotordynamic analysis of a rotating structure. A 2-D axisymmetric
geometry is extracted from a 3-D solid model of the rotating
structure. Modal, Campbell diagram, and unbalance response
analyses are performed for the 2-D and 3-D models. Results for
the 2-D axisymmetric model are compared to the full 3-D solid
model results.
Viscoelastic Analysis of an All-Ceramic
Fixed Partial Denture (FPD)
Demonstrates the fictive-temperature model using the ToolNarayanaswamy (TN) shift function to study residual stresses in
an all-ceramic fixed partial denture (FPD). A coupled-field solution
process, including transient thermal and nonlinear structural
analyses, is used in the problem simulation.
Modal Analysis of a Wind Turbine Blade
Using Beam Elements
Effectively uses a current-technology beam element to simulate
a wind turbine blade, a slender composite structure. A simplified
1-D beam-based model of the typically complex blade geometry
is especially useful in the early design stage, when small design
variations can lead to partial or even complete reconstruction of
a 3-D model, generally an impractical solution given the difficulty
of building the model.
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9
Chapter 2: ANSYS Mechanical APDL
2.7.2. Spin Softening Documentation Updates
Spin-softening documentation in the Structural Analysis Guide, the Command Reference, and the Theory Reference for the Mechanical APDL and Mechanical Applications has been enhanced to better present prestressed
large-deflection analysis (NLGEOM,ON). To incorporate the spin-softening effect of a rotating structure undergoing large deflections, the updated documentation describes the use of the OMEGA/CMOMEGA commands with KSPIN = OFF (default setting) in a static analysis, and then the use of OMEGA/CMOMEGA with
KSPIN = ON in a subsequent prestressed modal analysis.
2.7.3. Documentation Updates for Programmers
Release 12.1 includes the following documentation updates for programmers:
2.7.3.1. Routines and Functions Updated
2.7.3.2. Creating a Dynamic-Link (DLL) Library
2.7.3.1. Routines and Functions Updated
Routines and functions documented in the Programmer's Manual for ANSYS have been updated to reflect
the current source code. To see specific changes in a file, ANSYS, Inc. recommends opening both the old
and current files (using a text editor that displays line numbers), then comparing the two to determine which
lines have changed. You can copy the updated files to your system by performing a custom installation of
the product.
2.7.3.2. Creating a Dynamic-Link (DLL) Library
Documentation has been added to describe the process for setting up user-programmable features in Windows
systems using a DLL library, rather than by creating a custom executable. See Creating a Dynamic-Link (DLL)
Library in the Programmer's Manual for ANSYS for details.
2.8. Known Incompatibilities
The following incompatibility with prior releases is known to exist at Release 12.1.
2.8.1. Argument List Changed for User Subroutine usrsurf116
The argument list for the user programmable subroutine usrsurf116 has changed at this release. Subroutines written to follow the usrsurf116 format of previous releases are not compatible when linked
with v. 12.1. See Subroutines for Customizing Loads in the Programmer's Manual for ANSYS for the revised
usrsurf116 format.
2.9. The ANSYS Customer Portal
If you have a password to the ANSYS Customer Portal (http://www.ansys.com/customerportal), you can view
additional documentation information and late changes. Navigate to Product Information> Product Documentation> Readme files and late document changes.
The portal is also your source for ANSYS, Inc. software downloads, service packs, product information (including
example applications, current and archived documentation, undocumented commands, input files, and
product previews), and online support.
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Chapter 3: ANSYS Workbench
3.1. Advisories
Virus Scanning Products
The ANSYS Workbench uses scripting languages to display information in the user interface. These scripting
languages when used in World Wide Web pages are susceptible to viruses. Many virus scanning products
will install a proxy to verify that scripts on a web page do not contain a virus. Some virus scanning products
may leak excessive amounts of memory when running the ANSYS Workbench product. Check your specific
product's support pages to see if a memory leak has been reported and the solution for it.
3.2. ANSYS Workbench 12.1
Release 12.1 builds on the Release 12.0 framework, most notably adding support for the Linux operating
system and for journaling and scripting.
3.2.1. ANSYS Workbench 12.1 Linux Support
ANSYS Workbench now has limited support on Linux platforms at Release 12.1.
3.2.1.1. Supported Platforms, Applications, and CAD Products
The Linux platforms and the applications listed below are supported.
•
•
Supported Linux Platforms
–
Red Hat Enterprise Linux 5 32-Bit
–
SUSE Linux Enterprise 10 64-Bit
Supported ANSYS Products, Applications, and Workspaces
–
Workbench Framework
–
CFD-Post
–
CFX
–
CFX-Mesh
–
DesignModeler
–
DesignXplorer
–
FLUENT
–
Icepak
–
Mechanical APDL
–
Meshing
–
TurboGrid
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Chapter 3: ANSYS Workbench
–
•
•
Vista TF
Supported CAD Readers
–
ACIS
–
IGES
–
Parasolid
–
STEP
Supported CAD Plugins
–
Unigraphics NX5 on SUSE Linux Enterprise 10 64-Bit only
–
Unigraphics NX6 on SUSE Linux Enterprise 10 64-Bit only
3.2.1.2. Linux Behavior
If an ANSYS Workbench project file that was saved using a Windows installation of ANSYS Workbench contains
data from an application that is not supported on the Linux installation of ANSYS Workbench (for example,
the Mechanical application or the FE Modeler application), the project will be closed automatically when
you open it (File > Open from the ANSYS Workbench main menu) on Linux. The same behavior may also
occur for a project file involving users on two Windows installations, in cases where the source installation
includes applications that were not installed with the target installation.
3.2.1.3. Linux Restrictions
Please be aware of the Linux restrictions listed below.
Features related to Compact Mode are not supported. These include multi-window Minimize, Maximize,
Restore, Close, and Tile functionality, as well as Keep on Top mode for the Project Schematic and automatic
collapse/restore of the Project Schematic when not in use/in use.
3.2.2. Journaling and Scripting in ANSYS Workbench
With 12.1, ANSYS Workbench now supports journaling and scripting. Journaling captures the operations
that modify data in an ANSYS Workbench session and records them in a journal file. A journal file can be
replayed to return the state of your ANSYS Workbench session, or a journal can be modified to change or
incorporate additional operations, which is referred to as scripting. ANSYS Workbench journaling and
scripting allows you to easily replay previously recorded journals or reconstruct previously created projects,
automate repetitive tasks, or execute simulation projects in batch mode.
Journaling fully supports all operations performed in the ANSYS Workbench framework or native applications,
including all operations performed in the Project Schematic, Engineering Data, and Design Exploration
workspaces. Project file and parameter management is also fully supported by journaling. Although operations
performed in data-integrated applications like DesignModeler and the Mechanical and Meshing applications
are not journaled, commands native to these applications can be embedded in an ANSYS Workbench script.
Python-Based ANSYS Workbench journaling and scripting is based on the Python programming language.
Python is a concise, yet highly readable programming language, and its standard data types and comprehensive tools provide a powerful scripting foundation for ANSYS Workbench.
Object-Based Scripting ANSYS Workbench takes an object-based approach to scripting. The interaction
with data and operations is defined by “objects”, or data structures consisting of both properties and
methods. The scripting interface provides a set of query functions which return these objects. Once an object
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of ANSYS, Inc. and its subsidiaries and affiliates.
External Connection Add-in
reference has been obtained, its properties can be directly queried and modified, or its methods can be
called to invoke more complex operations and calculations.
Portable and Platform-Independent ANSYS Workbench journals and scripts are platform-independent,
meaning that a journal can be recorded on one computer platform and executed on another. The ANSYS
Workbench scripting interface also provides several utilities to make them highly portable. For example, the
locations of project files, such as CAD files, are recorded using a path root preference that allows the script
to be replayed on a different machine or file system location without having to modify absolute file paths.
Convenient Command Window In addition to replaying journals and executing scripts, ANSYS Workbench
provides a command window where individual commands can be manually invoked. To avoid tedious typing,
the command window supports command completion and maintains a history of previously-issued commands
for easy recall.
Support for Other Scripting Languages ANSYS Workbench can interact with a series of data-integrated
applications, including Mechanical APDL, ANSYS FLUENT, ANSYS CFX, DesignModeler, and the Mechanical
and Meshing applications. These applications have their own native scripting languages, and the ANSYS
Workbench scripting interface allows application-native scripts for data-integrated applications to be embedded in an ANSYS Workbench script. This coordination of scripting languages allows existing investments in
scripting to be re-used.
Complete Reference Documentation The public scripting interface for ANSYS Workbench is fully documented in the Workbench Scripting Guide. In addition to detailed descriptions of the methods and data
structures, this guide provides several examples to better understand the capability. Before attempting to
use ANSYS Workbench scripting, you should become familiar with the documentation and the concepts
described in it.
3.2.3. Other ANSYS Workbench 12.1 Enhancements
Data Integration
At Release 12.1, ANSYS Workbench has added data integration of the AQWA, POLYFLOW, and Icepak applications.
External Connection Add-in
A significant enhancement at Release 12.1 is the introduction of the External Connection add-in, which allows
external applications (applications not integrated with ANSYS Workbench) to participate in the ANSYS
Workbench workflow by consuming and producing parameters. This addin enables external applications to
take advantage of ANSYS Workbench capabilities such as the design point table, as well as DesignXplorer
capabilities such as Design of Experiments, sensitivity, and six sigma design studies.
Using the External Connection addin does not require writing compiled code. An XML configuration file
defines communication between the external process and ANSYS Workbench, including:
•
input and output parameters to be exposed in ANSYS Workbench
•
the name of the external script or executable to be run when the system is updated from ANSYS
Workbench
•
custom properties (which might affect how the external program executes)
•
directory structure
•
error handling
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of ANSYS, Inc. and its subsidiaries and affiliates.
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Chapter 3: ANSYS Workbench
•
custom menu entries (to be displayed in the cell context menu within ANSYS Workbench)
In addition, it is also possible to add custom toolbar and/or menubar entries to enable further customization,
where Python scripts can be executed from these custom entries.
For more information on using the External Connection add-in, see the External Connection Add-in for
Workbench Guide.
Other Enhancements
Other enhancements to the ANSYS Workbench framework at Release 12.1 include:
•
Improved error handling during Update All Design Points operations: During an update of multiple
design points, any errors or warnings encountered will result in messages being written to the Message
view, allowing other design point updates to continue without waiting for you to respond to message
dialogs. A summary dialog is presented after all design point updates are complete.
•
Visual indication of failure to some state icons: If Refresh or Update operations fail on a cell in the
Project Schematic, a red X will be indicated in addition to the appropriate state icon. Three failure states
are possible:
–
Refresh Failed, Refresh Required
–
Update Failed, Update Required
–
Update Failed, Attention Required
•
Single selection for export all design points: An option was added that allows you to mark all design
points for export with a single selection.
•
Improved deleted files message handling: Messages have been improved when you open a project
for which files have been deleted. The new messages provide direction on recovering and/or proceeding
with the project.
•
Recently used files: An option has been added that allows you to control the number of files displayed
in the recently used files lists.
3.3. DesignModeler Release Notes
Advisories (p. 14)
Feature Enhancements (p. 14)
Model Enhancements (p. 15)
CAD Enhancements (p. 16)
Incompatibilities and Changes in Product Behavior from Previous Releases (p. 17)
3.3.1. Advisories
Mechanical Desktop
Mechanical Desktop will not be supported in future releases of ANSYS.
3.3.2. Feature Enhancements
Mid-Surface Feature Improvements
The Mid-Surface feature has been modified in two ways:
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of ANSYS, Inc. and its subsidiaries and affiliates.
Face Level Visibility
1.
The output bodies are grouped into parts based on the original bodies they came from if the resultant
mid-surface of a solid body produces multiple surface bodies.
2.
The automatic face pair detection logic has been enhanced to more intelligently select face pairs in
regions where holes and slots exist.
Non-uniform Enclosure Groups
Within the Enclosure feature, the Cushion option has been enhanced to allow values for box or cylinder
type enclosures to be either uniform or non-uniform. Available for all enclosure shapes except User Defined,
the non-uniform cushion values may also be set as design parameters.
Load DesignModeler Database Option
New at ANSYS release 12.1, the Load DesignModeler Database option provides for quickly loading a different
AGDB file without first closing and then reopening DesignModeler.
Auto-Save Now and Restore Auto-save File
After selecting Generate after a specified number of times, the DesignModeler application now automatically
saves backup files of a model. The Auto-save Now feature is used to save immediately. The Restore Autosave File feature enables stored files to be accessed.
Surface From Faces Feature
Surface bodies can now be created in the DesignModeler application by using the Surfaces From Faces
feature. The feature can be used to produce multiple surface bodies, depending on the connectivity of the
selected faces.
Multiple Construction Points
The Point feature now has the ability to define multiple points when using Manual Input as the point
definition option. Any number of construction points may be created from a single Point feature by adding
additional point groups to the Details View property list.
3.3.3. Model Enhancements
Hard Edge Repair Tool
The Repair feature now includes the Repair Hard Edges option. Used on solid and surface bodies only, the
tool is used to remove hard edges from a model.
Large Model Support
DesignModeler can now support models larger than 1 km in size. A large model support checkbox option
will be available when using either Meter or Foot as the unit. When enabled, DesignModeler will permit
models up to 1000 km in size.
Face Level Visibility
Three Hide/Show Faces options have been added to the Context Menu. Applicable to bodies that are not
suppressed and not marked as hidden, the options are:
•
Hide Face(s): to hide selected faces.
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of ANSYS, Inc. and its subsidiaries and affiliates.
15
Chapter 3: ANSYS Workbench
•
Hide All Other Faces: to hide all faces in the model, except selected faces.
•
Show All Faces: to reset the visibility of all faces in the model to visible.
Solid-Surface Mixed Dimension Support
When sharing topology in the 3D modeling mode, the types of bodies in a multi-body part often dictate
how the part will share topology. ANSYS release 12.1 now allows surface body and solid body parts to use
the automatic, imprints, and none method to share topology.
Solid-surface Mixed Part Support during Import
The Mixed Import Resolution option, which allows mixed dimensions to be imported as components of assemblies, now includes a Solid and Surface option. Solid and Surface means only solid(s) and surface(s) from
a part are transferred to the ANSYS Mechanical application or DesignModeler.
3.3.4. CAD Enhancements
Linux Reader Support
ANSYS Workbench now supports the Linux operating system. The readers and plugins supported are:
•
Reader for ACIS (SAT)
•
Reader for Parasolid
•
Reader for IGES
•
Reader for STEP
•
Reader for Pro/Engineer (32-bit only)
•
Reader for Unigraphics NX (64-bit only)
Solid Edge ST1/V100 Support
ANSYS release 12.1 supports Solid Edge ST including synchronous document import via the Solid Edge
plugin. Solid Edge describes synchronous modeling as the enablement of simultaneous, direct geometry
creation and modification through precision sketching, region selection, face selection, and handle selection.
CATIA V5 Layer Support
CATIA V5 Layers can now be imported into ANSYS Workbench via the Named Selection option. When a
CATIA V5 model is imported, the Named Selections created for each CATIA V5 Layer is processed.
Autodesk Inventor 2010 Support
ANSYS Workbench now supports Autodesk Inventor 2010, this includes the ability to comprehensively import
Inventor parts which contain multiple solid bodies.
CAD Configuration Manager
This tool is now available on Linux, allowing users to conveniently add, change or remove CAD sources.
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of ANSYS, Inc. and its subsidiaries and affiliates.
3.4.1. BladeGen
3.3.5. Incompatibilities and Changes in Product Behavior from Previous Releases
Import Line Bodies Behavior
At ANSYS release 12.0 the default option for Import Line Bodies was changed to coincide with the added
support for line body import from a number of geometry interfaces. This was necessary because the entities
which are being imported as line bodies from a number of CAD system were creating mixed dimension
multibody parts. To avoid the confusion on this matter the preference was turned off. You can modify the
value for a given session in the Project Schematic before editing or in the details view for any import/attach
feature in the DesignModeler application. You can also revert to the old preference set by making a onetime
change to the Project Schematic's options panel using Tools> Options> Geometry Import and then checking
the Line Bodies option.
3.4. TurboSystem Release Notes
TurboSystem is a set of software applications and software features that help you to perform turbomachinery
analyses in ANSYS Workbench.
ANSYS TurboGrid is a meshing tool for turbomachinery blade rows. The release notes for ANSYS TurboGrid
are given at “ANSYS, Inc. Release Notes > Chapter 7, ANSYS TurboGrid (p. 47)”.
CFX-Pre, a CFD preprocesor, and CFD-Post, a CFD postprocessor, are part of the ANSYS CFX product. Both
of these products have Turbomachinery-specific features. The release notes for CFX-Pre are given at “ANSYS,
Inc. Release Notes > Chapter 6, ANSYS CFX (p. 41)”. The release notes for CFD-Post are given at “ANSYS, Inc.
Release Notes > Chapter 9, ANSYS CFD-Post (p. 55)”.
Release notes for Release 12.1 of the remaining TurboSystem applications are provided in the following
sections:
BladeGen (p. 17)
BladeEditor (p. 18)
Vista TF (p. 19)
About the 12.0 Release of TurboSystem provides historical information about Release 12.0 of TurboSystem
for the benefit of users who migrated directly from Release 11.0 to Release 12.1.
Note
After reviewing these release notes, you are encouraged to see Usage Notes, which describes
some known TurboSystem-related workflow issues and recommended practices for overcoming
these issues.
3.4.1. BladeGen
BladeGen is a geometry-creation tool for turbomachinery blade rows.
These release notes for BladeGen are divided into the following topics:
3.4.1.1. BladeGen New Features and Enhancements
3.4.1.2. Known Limitations Applicable to BladeGen
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of ANSYS, Inc. and its subsidiaries and affiliates.
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Chapter 3: ANSYS Workbench
3.4.1.1. BladeGen New Features and Enhancements
There are no significant new features in BladeGen.
3.4.1.2. Known Limitations Applicable to BladeGen
•
In Vista CCD, the semi-perfect gas option fails to work correctly and was therefore disabled. If the ideal
gas option is not sufficient for your case, the real gas option is still available. The intention of the semiperfect gas option was to provide a more accurate solution than the ideal gas option provides for air
and nitrogen, by allowing the ratio of specific heats to vary with temperature. The semi-perfect gas
option is typically only useful when working with air compressors of very high pressure ratio, for example
9:1.
•
Be aware that when using real gas properties in Vista CCD, the RGP data is not saved with the BladeGen
model. Instead, the RGP data is in a separate file and the Vista definition contains a reference to it. When
you view the Vista CCD definition for a model that uses real gas properties, you may be asked to locate
the RGP file if the file specified in the Vista definition cannot be found.
3.4.2. BladeEditor
ANSYS BladeEditor is a plugin for ANSYS DesignModeler for creating, importing, and editing blade geometry.
These release notes for BladeEditor are divided into the following topics:
3.4.2.1. BladeEditor New Features and Enhancements
3.4.2.2. Known Limitations Applicable to BladeEditor
3.4.2.1. BladeEditor New Features and Enhancements
•
Auxiliary view (Beta feature)
This feature includes a blade-to-blade view and a blade lean angle graph.
•
Blade design parameterization (Beta feature)
This feature enables you to assign an input parameter to any numeric BladeEditor feature property.
•
If you use the VistaTFExport feature in Release 12.1, and the ThroatArea feature is used for a selected
Blade, the throat information for that blade will be written to the .geo file. This information may improve
the calculation of the choke mass flow rate in the Vista TF solver. Without this information, Vista TF will
make its own estimate of the throat area. In Release 12.0, the throat widths are not added to the Vista
TF geometry file.
Note that the new features marked as “Beta” in the above list are not available until you enable Beta options
in ANSYS Workbench.
3.4.2.2. Known Limitations Applicable to BladeEditor
KNOWN DATA LOSS PROBLEM - You can very easily destroy your BladeEditor models by simply updating
a project or otherwise processing a Geometry cell, depending on your license preference settings. This
problem can affect you if you have any ANSYS DesignModeler licenses. To learn how to avoid this problem,
please read the following section in the ANSYS BladeEditor documentation: Configuring the BladeModeler
License.
There is a known limitation with the ImportBGD feature when importing multiple BladeGen files. If you have
imported two or more BladeGen files using separate ImportBGD features, and have turned on shroud
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of ANSYS, Inc. and its subsidiaries and affiliates.
3.4.3. Vista TF
clearance for one of these features, then the import process may fail. The workaround is to import the case(s)
with shroud clearance first, then import the others.
Furthermore, changing the Blade Design cell Shroud Clearance property from "Relative Layer" or "Absolute
Layer" to "None" will have no effect on the ImportBGD feature. In this case, you must change the Shroud
Clearance property directly in the ImportBGD feature.
When you create a flow path contour sketch, you must be editing in a (global) ZX-plane. The local X and Y
axes on the sketch plane correspond to the global Z and X axes, respectively. The local X axis corresponds
to the machine axis and the local Y axis corresponds to the radial coordinate axis. Consequently, all flow
contours in the sketch must have positive Y coordinates.
The following is a list of known limitations that apply to new BladeEditor features (but not the ImportBGD
feature):
•
Model:
–
•
Layers:
–
•
•
Only the ‘Angle/Thickness’ mode is supported.
Only specified span fraction layers are supported.
Angle Definition:
–
Only Theta and/or Beta definitions are supported.
–
Only ‘General’ and ‘Ruled Element’ spanwise distributions are supported.
–
At least one angle definition must exist on either the hub or shroud layer.
–
The Angle View Data Location must be ‘Meanline’.
–
Splitting and joining curve segments is not supported.
Thickness Definition:
–
Only the ‘Normal to Meanline on Layer Surface’ thickness data type is supported.
–
The ‘vs. Cam’ and ‘% Cam vs. % Cam’ thickness specifications are not supported.
–
Only the ‘General’ spanwise distribution is supported.
–
At least one thickness definition must exist on either the hub or shroud layer.
–
Splitting and joining curve segments is not supported.
3.4.3. Vista TF
Vista TF is a tool for performing rapid throughflow analyses of rotating machinery for preliminary design
purposes.
Enhancements to Vista TF:
•
The leading and trailing edges for each blade row are now shown in the 2D plots in CFD-Post.
Installation note: Vista TF is always installed, but CFD-Post is required to post-process Vista TF results. Without
CFD-Post, the Results cell of the Vista TF system will not be visible.
Vista TF was developed by PCA Engineers Limited, Lincoln, England.
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of ANSYS, Inc. and its subsidiaries and affiliates.
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Chapter 3: ANSYS Workbench
3.5. ANSYS Icepak Release Notes
Release 12.1 of ANSYS Icepak has new features and defect fixes.
3.5.1. New and Modified Features in ANSYS Icepak 12.1
•
•
Graphical User Interface
–
ANSYS Icepak can be run as a standalone product or within the ANSYS Workbench framework. See
Chapter 3 of the User's Guide.
–
The File menu and the file commands toolbar options are different in ANSYS Workbench. See Section
2.1.2 of the User's Guide.
ECAD import/export
–
•
Modeling and meshing
–
•
•
Export of Simplorer file in the Parameters and optimization panel. See Section 29.7.1 of the User's
Guide.
Multi-level meshing can be enforced for all objects. See Section 7.3.8 of the User's Guide.
Postprocessing and reporting
–
Electric current density, joule heating density and Wall YPlus variables are available for postprocessing. See Section 36.2 of the User's Guide.
–
ANSYS CFD Post files are automatically written out when running ANSYS Icepak in Workbench. See
Section 5.7.7 of the User's Guide.
Miscellaneous
–
ANSYS Icepak data transfer occurs in ANSYS Workbench 12.1 from Icepak to Mechanical.
–
Tetrahedral mesher has been discontinued and is no longer available in ANSYS Icepak.
–
ANSYS Icepak 12.1 supports both the Fluent FLEXlm and ANSYS FLEXlm license managers.
–
ANSYS Icepak workflow in ANSYS Workbench 12.1 allows the automatic export of STEP files from
Design Modeler to ANSYS Icepak.
3.5.2. Known Limitations of ANSYS Icepak 12.1
•
MCM/BRD import is available only on the Windows and Linux platforms.
•
Gerber import is available only on the Windows platform.
•
ANSYS Icepak to Mechanical workflow in Workbench is available only on the Windows platform.
•
STEP export may not work on some objects, especially cylindrical objects.
•
STEP export is not supported on the IBM and HP-Alpha UNIX (Tru64 UNIX) platforms.
•
Non-conformal assemblies cannot intersect each other.
•
Non-conformal assemblies cannot touch objects (except the cabinet and hollow objects.)
•
Thin plates cannot intersect or touch non-conformal assemblies.
•
CAD shaped objects cannot intersect or touch non-conformal assemblies.
•
The biaxial conductivity option for objects other than thin plates is not allowed.
•
Fast trials cannot be used when the properties of the default fluid are parameterized.
•
Batch queuing capability cannot be used to run trials/jobs across platforms.
20
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
Key Technology Areas for the Meshing Application in Release 12.1
•
ANSYS (Classic) solution data file export is available only on the 32–bit Windows platform.
•
Cartesian Hex-Dominant mesh option cannot be used when 2D CAD shapes are present.
•
Microsoft Job Scheduler can only be used on the Windows platform.
3.6. CFX-Mesh Release Notes
Known Limitations
The known limitations of CFX-Mesh are:
•
CFX-Mesh on 64-bit versions of Microsoft Windows Vista is unable to support 2D regions for some imported geometry files, e.g. SAT files.
•
The user interface for CFX-Mesh is always in English regardless of the language setting.
3.7. Meshing Application Release Notes
Summary of Goals for the Meshing Application Release 12.1
Release 12.1 of the Meshing application addresses these goals:
•
To provide Linux support
•
To improve upon the robustness and usability of Release 12.0, especially as they relate to GAMBIT and
CFX-Mesh user migration
Key Technology Areas for the Meshing Application in Release 12.1
Release 12.1 of the Meshing application offers new features and enhancements in the following key technology
areas, details of which are described below:
•
•
•
Framework integration
–
Linux support
–
Journaling and scripting
–
Meshing 0-thickness walls
–
PolyFlow integration
–
Exporting faceted geometry to TGrid
–
FLUENT mesh export enhancement
Mesh controls
–
Mesh metric graph
–
Mesh numbering controls
–
Mixed order meshing
–
Virtual Topology improvements
–
Named Selection improvements
–
Post inflation improvements
Mesh methods
–
MultiZone improvements
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
21
Chapter 3: ANSYS Workbench
–
Sweep improvements
–
Patch Independent Tetra improvements
–
Smoothing improvements
Framework Integration Enhancements
The following Framework integration enhancements have been made at release 12.1 of the Meshing application:
•
Linux support. Refer to ANSYS Workbench 12.1 Linux Support (p. 11) for details.
•
Journaling and scripting at the project level. Refer to Journaling and Scripting in ANSYS Workbench (p. 12)
for details.
•
Using the Patch Conforming Tetra or Patch Independent Tetra mesh methods, you can mesh 0-thickness
walls, or baffles, as non-manifold faces of a solid body. You do not have to adjust the mesh size to
capture the thin regions. Inflation layers can be grown off of the 0-thickness walls. As is true when
meshing other types of walls, if you select Program Controlled inflation, baffles are automatically selected to be inflation boundaries unless they are in a Named Selection.
•
PolyFlow is now data-integrated with ANSYS Workbench, allowing for a new workflow: CAD/DesignModeler > Meshing > PolyFlow > CFD-Post.
In support of this integration, you can right-click a Mesh cell and choose Import Mesh File to import
a legacy PolyFlow mesh file (with extension .poly, .neu, or .msh) into the Mesh cell. You can also transfer
a mesh (.poly file) from the Mesh cell of a Mesh system into the Setup cell of a downstream PolyFlow
system.
In addition, a new Solver Preference for PolyFlow has been added to tailor the mesh to your needs.
The appropriate defaults are set based on this preference.
•
You can export faceted geometry for subsequent import into TGrid, allowing for a new workflow:
CAD/DesignModeler > Meshing > TGrid > FLUENT. Part and body names, as well as Named Selections,
are preserved in the exported .tgf file. The .tgf file has the same format as a .msh file and will be recognized as a "Mesh File" when read into TGrid 5.2 (File/Read/Mesh... menu item).
•
In support of FLUENT mesh export, in this release an orientation check/correction will be performed for
3D geometry models exported as 2D mesh such that all 2D cells will have the same orientation. A
manual correction of the orientation of the geometry face(s) is no longer needed.
Mesh Control Enhancements
The following mesh control enhancements have been made at release 12.1 of the Meshing application:
•
22
A bar graph has been added to the Mesh Metric option. The graph contains bars for each element
shape represented in the model's mesh, and can be manipulated to view specific mesh statistics of interest. You can select an individual bar or multiple bars on the graph, and the Geometry window displays
only those elements that meet the criteria corresponding to the selected bar(s). Using the bar graph
controls page, you can filter the information the graph presents by setting characteristics such as:
number of bars to display, element types to display, minimum/maximum ranges for the X- and Y-axes,
and content of the Y-axis (either Number of Elements or Percent of Volume/Area). Depending on the
metric of interest, you can adjust the minimum or maximum range of the X-axis to locate and estimate
the number of bad elements in a mesh.
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
Mesh Method Enhancements
•
The new Mesh Numbering feature allows you to renumber the node and/or element numbers of a
generated meshed model consisting of flexible parts. The feature is useful when exchanging or assembling
models and could isolate the impact of using special elements such as superelements.
•
Mixed order meshing is supported across bodies for the following mesh methods: Patch Conforming
Tetra, General Sweep, Thin Sweep, Hex Dominant, Quad Dominant, and Triangles. This means that when
scoping one of these mesh methods to bodies in a multibody part, you can set the Element Midside
Nodes option to Kept (resulting in higher order elements) for some bodies and to Dropped (resulting
in lower order elements) for others. Mixed order meshing results in one layer of quadratic elements at
the interface face. These elements will be higher order at the interface face but with dropped midside
nodes where adjacent to the linear elements in the mesh. On a Mesh Metric bar graph, mixed order
elements are displayed as quadratic element types.
•
This release includes improvements in Virtual Topologies (VTs), which are faceted representations of
the original geometry. By default, mesh projection is to the facets. For improved projection, you can
use the new Project to Underlying Geometry option to project the nodes back to the underlying geometry
instead. In addition to this new option, other enhancements have been made to improve the underlying
representation of VTs, resulting in increased robustness and better mapped meshes on VTs.
•
Named Selection improvements include:
•
–
A new option is available to make it easier to locate and resolve problems when the same entity is
a member of more than one Named Selection (that is, when Named Selections are “overlapping”).
If overlapping Named Selections are detected during mesh export, the export fails with an error
message. By right-clicking on the Mesh object and selecting the Show Geometry in Overlapping
Named Selections option from the context menu, you can display the geometry in the overlapping
Named Selections in the Geometry window.
–
You can use the new Include in Program Controlled Inflation option to select specific Named Selections for inclusion in Program Controlled inflation. (By default, faces in Named Selections are not
selected to be inflation boundaries when Use Automatic Tet Inflation is set to Program Controlled.)
Post inflation improvements include:
–
When used with Post inflation, the Transition Ratio option now works similarly to how it works
with Pre inflation. (Transition Ratio controls the growth transition from prism layers to tets.)
–
Robustness is improved when using Post inflation with the Layer Compression option for the
Collision Avoidance control.
Mesh Method Enhancements
The following mesh method enhancements have been made at release 12.1 of the Meshing application:
•
•
MultiZone mesh method improvements include:
–
For revolved models, improved wedges at axis and increased robustness and smoothness
–
For projections, support for helix models and increased robustness for cases having side faces with
high curvature
–
For multibody parts, increased robustness and better handling of side faces
–
For inflation cases, increased robustness
Sweep mesh method improvements include:
–
For General Sweep, better support for sphere source faces and increased robustness
–
For Thin Sweep, increased robustness for thicker models and variable thickness
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
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Chapter 3: ANSYS Workbench
–
•
•
Improved conflict error handling for scoped sizing controls with mapped mesh, and improved
highlighting of problem areas for both General and Thin Sweep
Patch Independent Tetra mesh method improvements include:
–
Support for the Behavior option. You can specify a Behavior option of either Soft or Hard, in order
to give preference to either curvature refinement or the size control respectively.
–
Meshing is more robust due to the addition of out-of-memory errors and improved handling of
complicated geometries.
In certain cases in which Smoothing is set to High, an additional smoothing attempt will be performed
automatically to improve element quality measured in terms of Skewness.
3.8. Mechanical Application Release Notes
This release of the Mechanical application contains all of the capabilities from previous releases plus many
new features and enhancements. Areas where you will find changes and new capabilities include the following:
Incompatibilities and Changes in Product Behavior from Previous Releases
Release 12.1 includes several new features and enhancements that result in product behaviors that differ
from previous releases. These behavior changes are presented below.
•
Force Reaction and Moment Reaction Probes support Cartesian coordinate systems only. Prior to release
12.1, these probes allowed users to choose cylindrical coordinate systems for displaying results. The
reported results however were incorrect.
•
When resuming a project created in release 12.0 that uses ANSYS FLUENT 1-way FSI, you cannot import
previously defined loads because the syntax for the file path has changed. New loads will need to be
added to import data.
Resuming Databases from Previous Releases
Note the following when resuming databases from previous releases:
•
Explicit Dynamics (ANSYS) System: When resuming an Explicit Dynamics (ANSYS) system that was
created prior to release 12.1, a Pre-Stress object will automatically be added to the object tree.
General Enhancements
The following general enhancements have been made at release 12.1:
•
Explicit Dynamics (ANSYS) System: Pre-Stress Implicit to Explicit Data Transfer. For an Explicit Dynamics (ANSYS) system, the Initial Conditions folder now includes a Pre-Stress object to control the
transfer of data from an implicit static or transient structural analysis to the explicit dynamics analysis.
Transferrable data include the displacements, or the more complete Material State (displacements, velocities, stresses, strains).
•
Explicit Dynamics (LS-DYNA Export) System: Additional Unit Systems. In addition to "mm, mg, ms"
the following unit systems are now also supported for export to the LS-DYNA solver:
24
–
m, kg, s
–
mm, ton, s
–
in, lbf, s
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
Loads/Supports Enhancements
Geometry Enhancements
The following geometry enhancements have been made at release 12.1:
•
Mesh Numbering. The Mesh Numbering feature allows users to renumber the node and element
numbers of a generated meshed model consisting of flexible parts. The feature is useful when exchanging
or assembling models and could isolate the impact of using special elements such as superelements.
•
Snap to Mesh Nodes. When defining a path with two points, a new context menu option ensures that
the path is contained within the finite element mesh.
•
Thermal Point Mass. For transient thermal analyses, a Thermal Point Mass object has been added as
a medium to store or draw heat from surrounding objects.
•
Surface Construction Geometry. Users can now precisely define a section plane to be used for evaluating results.
•
Show Mesh. When a Path (from Construction Geometry) is active, users can choose to see the underlying
mesh instead of the geometry.
Connection Enhancements
The following connection enhancements have been made at release 12.1:
•
Explicit Entry for Configuring Joint Rotation. The Connections toolbar now includes a field for typing
a value for the joint rotation increment. This feature is an alternative to dragging the mouse cursor to
perform this function.
•
Explicit Dynamics (ANSYS) System:
– Bonded Connections with Line Bodies. Parts containing beam elements can now be included in
bonded connections with surface or volume bodies using the Body Interaction object.
–
•
Bonded Connections with DCR Contact Method. The discrete contact response contact method
can now be used in models containing bonded connections.
Explicit Dynamics (LS-DYNA Export) System:
–
Support for Line Body Contacts. Contacts that involve line bodies are now accounted for by also
exporting the *CONTACT_AUTOMATIC_GENERAL keyword.
– Support of Keyword Snippets for Contacts. The Keyword Snippet facility available with the LSDYNA Export systems is now also supported under Contact Regions. This facility allows for contacts
definitions specific to the LS-DYNA solver that are not available in the Details view of the contact
region to be defined and scoped to geometry.
Loads/Supports Enhancements
The following loads/supports enhancements have been made at release 12.1:
•
Constraint Equations. The constraint equation feature allows sections of a model to be bound together
according to a user-defined equation.
•
Line Pressure as a Function of Curvilinear Abscissa. For Line Pressure loads in a 3-D analysis or
Pressure loads in a 2–D analysis, pressure can be defined as a function of the distance along a path as
a tabular load or a function load.
•
Rotational Velocities Applied to Bodies. For assemblies, rotational velocity can be applied to all
bodies or to selected bodies.
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
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Chapter 3: ANSYS Workbench
•
Surface to Surface Radiation. Thermal Radiation can now be applied between two surfaces, or between
a body and the ambient temperature.
•
Ansoft-Mechanical Data Transfer. You can import a thermal load generated by the Ansoft HFSS,
Maxwell, or Q3D Extractor application and perform an analysis using the load. In the case of HFSS and
Maxwell, you can also export the thermal results so that they can be imported back into Ansoft HFSS
or Maxwell.
•
Icepak-Mechanical Data Transfer. The Mechanical application allows you to transfer nodal temperature
data from Icepak into Mechanical and perform an analysis using the imported loads.
•
Explicit Dynamics (ANSYS) System:
– Support for Cylindrical Coordinate Systems. Displacement and Velocity boundary conditions now
support cylindrical coordinate systems in the Explicit Dynamics (ANSYS) system. The y-component
of the cylindrical system defines the angular rotation or velocity of the scoped nodes/rigid bodies.
– Hydrostatic Pressure Load. The hydrostatic pressure boundary condition is now supported in the
Explicit Dynamics (ANSYS) system.
–
Expressions for Pressure and Velocity Boundary Conditions. Pressure and velocity boundary
conditions can now be defined as continuous functions of time in the Explicit Dynamics (ANSYS)
system environment. The value of the load/constraint is extracted directly from the defined expression
for each time point during the simulation (no discretization or interpolation is used).
Solution Enhancements
The following solution enhancements have been made at release 12.1:
•
Solve Remotely in Synchronous Mode. Synchronous solutions are now capable of running “in process”
or “out of process” (background) based on the new Solve Remotely in Synchronous Mode feature. This
new option enables the product to leverage the computational power of solving on a remote machine,
but in a synchronous fashion, allowing linked analyses and/or analyses involving adaptive refinement
loops to be solved with a single action within the Mechanical application. Refer to the table under Solve
Process Capabilities for further details.
•
More Efficient Joint Stop, Lock and Release Handling in Transient Structural (MBD) Analyses.
Solvers used in Transient Structural (MBD) Analyses now use the Linear Complementarity Problem (LCP)
algorithm to handle stop, lock and release conditions more efficiently.
•
Explicit Dynamics (ANSYS) System: Double Precision Solver Option. You now have the option to
solve explicit dynamics analyses using either the single or double precision executables using the Precision option of the Solver Controls under Analysis Settings.
Results Enhancements
The following results enhancements have been made at release 12.1:
•
Averaged and Unaveraged Result Enhancements. Various display options have been added for
viewing averaged and unaveraged result contours.
•
Average Result on a Surface. Any result item (including User Defined results) can be evaluated on a
surface previously defined through Construction Geometry.
•
Contact Based Force Reactions. For a Force Reaction probe applied to a contact region, a new setting
allows the reaction calculations to come directly from the contact elements themselves. This results in
accurate force reactions even when the contact region overlaps with other boundary conditions, such
as other contact regions, supports, etc.
26
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
Incompatibilities and Changes in Product Behavior from Previous Releases
•
Coordinate Systems Results. Nodal and elemental coordinate system result options are now available.
•
Radiation Probe. A Thermal Radiation probe is now available.
•
Trigonometric Functions Added to User Defined Result Expressions. Basic trigonometric functions
have been added to the mathematical operations supported for user defined results.
•
User Defined Results for Transient Structural (MBD) Analyses. Full support is available for User
Defined Results in Transient Structural (MBD) Analyses.
•
Explicit Dynamics (ANSYS) System: Result Tracker Filtering. Explicit Dynamics analyses typically involve
a large number of time points, sometimes in the order of hundreds of thousands. The tracker results
data tends to include high frequency noise that can obscure slow rate phenomena in low speed applications. A low-pass filtering option is now available that allows you to distinguish real trends in the data,
by removing the high frequency noise. This feature can be controlled from the Details view of a Result
Tracker object.
Ease of Use Enhancements
The following ease of use enhancements have been made at release 12.1:
•
Hide Faces. Selected faces on a model can now be hidden to enable viewing inside the model. This
feature is especially useful for viewing bodies with interior cavities, such as engine blocks.
•
Flip Periodic Low and Periodic High Settings. When using Periodic regions in an electromagnetic
analysis, the Periodic Low and Periodic High settings can now be reversed by choosing a new context
menu option.
•
Worksheet Enhancements. The Worksheet tab in previous releases has been replaced by a Worksheet
window that displays alongside the Geometry window, allowing simultaneous viewing of the model
and the Worksheet information.
•
Explicit Dynamics (LS-DYNA Export) System: Addition of Parameter Names in Exported Keyword
File. The parameter names for each card in the exported keywords have been added as comments to
aid the understanding of the file when read.
Other Enhancements
The following additional enhancements have been made at release 12.1:
•
Mechanical-Electronics Interaction (Mechatronics) Data Transfer . The Mechanical application allows
you to export a reduced model file to automatically create a Mechanical Component in Simplorer.
3.9. FE Modeler Release Notes
Incompatibilities and Changes in Product Behavior from Previous Releases
•
If you open an R12.0 project in R12.1, the information will be migrated to the 12.1 environment if necessary and messages about the migration may be reported.
•
If the Model cell of an FE Modeler system in an imported R12.0 project contains an initial geometry
generated over a mesh that contains 1D elements, you must update your initial geometry. Everything
that existed below the Initial Geometry will be lost (for example: Target Configuration, Transformations,
Parasolid Geometry, etc.) when you update it.
•
Body grouping only applies to meshes imported from NASTRAN, ABAQUS, and Mechanical APDL files.
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
27
Chapter 3: ANSYS Workbench
•
If you change any of the properties on an imported mesh after you have imported the meshes in FE
Modeler, you will be prompted to destroy all of the work that has been done on the meshes in the FE
Modeler Editor and you will have to re-analyze the meshes.
•
The Read-Only mode has been added to FE Modeler: if the Editor cannot retrieve an appropriate license,
it will open in Read-Only mode. In this mode, no editing can be done except for deleting objects.
The Following New Features Provide Extended FE Modeler Capabilities in the
Workbench Environment:
•
The Coordinate Systems View has been added to give the user a list of all coordinate systems used in
the model and their locations and orientations.
•
The Constraint Equations View provides the user with a list of all constraint equations imported into
the model and their locations.
•
Multiple meshes can be added to a single FE Modeler analysis system and will be combined into an
Assembly Mesh.
•
Multiple input meshes can be added to an FE Modeler system from files that are in acceptable formats
or from connections to upstream analysis systems. You can set the properties of the meshes, delete
meshes, and change the displayed order of the messages from the Project Schematic.
•
An FE Modeler system can accept input meshes from an upstream FE Modeler system.
•
Each input mesh has properties that depend on the source of the mesh (file type or upstream connection).
•
Body grouping specified for a file applies only to the entities from that file.
•
You can specify the ID renumbering for Nodes and elements that are contained in the input meshes.
For any input mesh (file or upstream connection), you can specify whether the IDs for Nodes and elements
should be retained as they are in the original mesh, or automatically renumbered as they are read into
the FE Modeler Editor. If no renumbering is specified, the mesh analysis will be terminated if an ID
overlap occurs. All other entity IDs (such as materials or thicknesses) are automatically renumbered.
The Following New Behavior is Seen when Working in FE Modeler Systems:
•
An upstream Mechanical system can transfer the following data to the FE Modeler system: Materials,
Mesh, Geometry, Named Selections, and Thicknesses.
•
Unit systems can be specified for meshes imported from files (however, not for files from the Mechanical and Meshing applications). They cannot be specified for upstream connections, except those that
come from Mechanical APDL systems. All meshes will be scaled to the unit system of the Assembly
Mesh.
•
The tables describing the possible upstream and downstream connections to an FE Modeler system
have been updated.
•
Node or Face components can be used when generating the initial geometry to create geometric entities
on which you can apply loads, constraints, etc. Node components can create faces, edges, and vertices
on the geometry.
•
Rotation and Translation transformations can be applied to whole parts in the Geometry.
•
Use the Write Solver File button to write the FE Modeler data to a solver file in order to easily generate
a customized Mechanical APDL, ABAQUS, STL, or NASTRAN input deck.
28
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
The Following New Behavior is Seen when Working in DesignXplorer Systems:
3.10. DesignXplorer Release Notes
Incompatibilities and Changes in Product Behavior from Previous Releases
•
All DesignXplorer capabilities are now available on Linux.
•
DesignXplorer is now localized in French and German.
•
For any feature that submits generated Design Points to the analysis system for solution (Design of
Experiments, Parameters Correlation, etc.), Design Points are solved simultaneously if the analysis system
is set up to do so; sequentially, if not.
The Following New Features Provide Extended Design Exploration Capabilities
in the Workbench Environment:
•
A Min-Max Search is now an optional component of the Response Surface. The Min-Max Search examines
the entire output parameter space of a Response Surface to approximate the minimum and maximum
values of each output parameter.
•
Manual refinement is now available for all Response Surface types that allows the user to enter specific
points into the set of points used to calculate the Response Surface.
•
Any new Refinement Design Points that are generated by any of the refinement methods will be retained by the Response Surface and used for any further analysis of that Response Surface (using a
different Response Surface Type, etc.).
•
The Correlation Scatter Chart now displays the Quadratic Correlation trend line in addition to the
Linear trend line. In conjunction with this, a Determination Matrix allows you to visualize how closely
the various input and output parameters are coupled in a quadratic regression.
•
Design of Experiments (DOE) capability has been enhanced:
–
When switching DOE types, Design Points generated for the new DOE type that were solved in a
previous analysis will be shown as up to date. Only new Design Points need to be submitted to the
analysis system for solution.
–
The Custom DOE Table can be in one of two modes: All Outputs Calculated, or All Outputs Editable. The default mode for the table is All Outputs Calculated. All Outputs Editable allows you to
enter values for any or all of the inputs and outputs in a row.
The Following New Behavior is Seen when Working in DesignXplorer Systems:
•
When you make any of the following changes to an input parameter in the first cell of the system
(DOE or Parameters Correlation cell):
–
enable or disable an input parameter
–
change the nature of an input parameter from continuous to usability or discrete, etc.
–
add or remove a level for a discrete or usability parameter
–
change the range definition of an input parameter
All generated data associated with the system that contains the modified parameter will be cleared.
Note that for all actions listed above except for "enable or disable an input parameter": If you change
the DOE type to Custom, you can retain Design Points that fall within the new ranges.
•
Design Points can be imported to a Custom DOE Table from the Parameter Set, or exported from the
Parameter Set to a specific Custom DOE cell.
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
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Chapter 3: ANSYS Workbench
3.11. Engineering Data Workspace Release Notes
Incompatibilities and Changes in Product Behavior from Previous Releases
The Engineering Data workspace at release 12.1 exhibits product behaviors that differ from previous releases.
These behavior changes are presented below.
•
The material property Coefficient of Thermal Expansion will be converted to Isotropic Secant Coefficient
of Thermal Expansion.
Material Property Enhancements
The following material property enhancements have been made at release 12.1:
•
Coefficient of Thermal Expansion now supports being defined as Instantaneous or Secant. Also the
ability to specify Isotropic or Orthotropic behavior has been added.
•
Anisotropic Elasticity can be defined through a lower matrix input.
Ease of Use Enhancements
When a material model has more than one independent variable it will be displayed in a split table to allow
for easier selection and viewing of data. For example, tabular material data like S-N curves based on mean
stresses will now be displayed in a split table for better selection and viewing of data.
3.12. EKM Desktop
Release 12.1 of ANSYS EKM Desktop contains defect fixes and an enhancement to the Reporting feature.
Report Generation Changes
The data used to generate Simulation Details reports in EKM Desktop 12.1 is now saved in the repository.
The report data is saved in a permanent folder called Saved Reports. The path for this folder is /Repository/Saved Reports.
You continue to generate Simulation Details Reports just like you did in version 12.0. The only change to
report generation is that the report name now contains the name of the file used to generate the data for
the report. For example, if you generate a report from 2dmesh.cas, the report name will be 2dmesh.cas
Simulation Details Report.
Once the report is generated, the data is saved in a folder under Saved Reports that has the same path as
that of the source file. For example, if you generate a report from /Repository/FLUENT/2dmesh.cas, the report
will be saved in /Repository/Saved Reports/FLUENT/2dmesh.cas Simulation Details Report.
Rerunning Reports
Once a report has been saved, you can run the report again by opening it from the Saved Reports folder.
You do this by either double clicking the report, opening the report from the context menu, or selecting
the report and clicking the Open button.
30
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
Hydrodynamic Diffraction (AQWA) [formerly named AQWAWB]
Comparing Report Contents
In EKM Desktop 12.1, you can now compare the content of multiple Simulation Details Reports. To do this,
you simply select one or more saved reports and generate a comparison report. In the Report wizard, you
can choose to compare all the content of the selected reports, or simply compare the content differences.
3.13. ANSYS AQWA
Building on the introduction of the ANSYS Workbench type User Interface for ANSYS AQWA in the previous
release, the Hydrodynamic Diffraction analysis system has been added to the Workbench Toolbox. The
analysis system can be placed on the Project Schematic, a geometry can be attached from another analysis
system or through a file, and the AQWA Editor can be started from the analysis system.
Incompatibilities and Changes in Product Behavior from Previous Releases
The AQWAWB application is now only available as a system from the Workbench toolbox and has
been renamed “Hydrodynamic Diffraction (AQWA)”. If version 12.1 is installed on a machine that already
has AQWA 12.0 installed, AQWAWB may fail to import an external geometry. If access to AQWAWB is still
required then version 12.0 should be re-installed after the 12.1 installation. AQWA databases (.aqdb files)
from the previous release can be imported into the Workbench environment.
The Following New Behavior is Seen in AQWA:
Hydrodynamic Diffraction (AQWA) [formerly named AQWAWB]
New Hydrodynamic Diffraction System in Workbench – At the 12.0 release a Workbench style interface
was developed for AQWA called AQWAWB. This was a standalone module that had the same look and feel
of other Workbench products, and could utilize geometries generated by DesignModeler. At 12.1 AQWAWB
has been fully incorporated as a system called Hydrodynamic Diffraction in ANSYS Workbench, so is now
available directly from the Project Schematic. This offers additional benefits, including direct linkage to ANSYS
DesignModeler importing of external CAD geometry, and facilitates the use of geometric parameterization.
AQWAWB is not available in this release and is replaced by the Hydrodynamic Diffraction system. The following
additional features have been incorporated into the Hydrodynamic Diffraction system:
•
Air gap visualization – Contour plotting of air gap values has been included as an option in the Pressures
and Motions results object.
•
Additional stiffness matrix definition – An additional stiffness matrix may now be defined for inclusion
in the radiation/diffraction analysis.
•
Frequency independent additional damping matrix definition – At release 12.0 only the diagonal
terms for roll and pitch could be defined. This has now been extended to allow the full 6x6 matrix to
be input for frequency independent additional damping.
•
Frequency independent additional added mass matrix definition – The full 6x6 matrix for frequency
independent added mass may now be defined.
•
User specified metacentric heights – The hydrostatic stiffness in the hydrodynamic database can be
modified to a user specified value creating additional stiffness automatically. This is achieved by specifying
the required GMX and GMY (about the global X/Y axis).
•
Automatic detection of submerged structures – If a structure has no elements at or above the water
line then this is now automatically detected and appropriate action taken with the solution. This may
be overridden if required.
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
31
Chapter 3: ANSYS Workbench
•
32
Optional program controlled frequency range – By default the program will automatically generate
equally spaced frequencies between a lower limit based on the water depth and an upper limit based
on the mesh density. The number of frequencies can be specified by the user.
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
Chapter 4: ANSYS ASAS, ANSYS AQWA, FEMGV
This release of the ASAS and AQWA related products contains all capabilities from previous releases plus
many new features and enhancements. The following enhancements are available in release 12.1. Please
refer to the product specific documentation for full details of the new features
Incompatibilities and Changes in Product Behavior from Previous Releases
Release 12.1 includes several new features and enhancements that result in product behaviors that differ
from previous releases. These behavior changes are described below:
•
The AQWAWB application is now only available from the Workbench toolbox and has been renamed
“Hydrodynamic Diffraction (AQWA)”. If release 12.1 is installed on a machine that already has AQWA
12.0 installed, AQWAWB may fail to import an external geometry. If access to AQWAWB is still required
then version 12.0 should be re-installed after the 12.1 installation. AQWA Databases (.aqdb files) from
the previous release can be imported into the Workbench environment.
•
The ANSTOASAS and ANSTOAQWA commands and macros that may be utilized from within ANSYS
Mechanical produce external files that are now, by default, deleted. The files can be retained by setting
the Delete Unneeded Files option to No in the Analysis Settings details (Output Controls, Analysis Data
Management, Delete Unneeded Files).
4.1. ANSYS ASAS
The Following New Features Provide Extended Capabilities in ANSYS ASAS:
The following new features are available in release 12.1 of ANSYS ASAS:
•
ISO19902 Code of Practice implemented – The code checking for structural steel frames has been
extended to include member, dented member, and joint checking to ISO 19902.
•
On line documentation – The documentation for the code checking module BEAMST is now available
from the ANSYS on-line help system.
•
New GEN1 element – This element can be utilized to provide user defined stiffness, damping and mass
data, and enables fully coupled analyses with third party solvers, such as FLEX5 for the modeling of
wind turbine rotor blade dynamics, via a shared memory dynamic link library.
4.2. ANSYS ASAS BEAMCHECK
The Following New Features are available in Release 12.1 of ANSYS ASAS
BEAMCHECK
ASAS Beamcheck is the version of the ASAS code checking module BEAMST that permits processing of results
from an ANSYS Mechanical or Mechanical APDL structural analysis. The following enhancements have been
implemented at 12.1:
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of ANSYS, Inc. and its subsidiaries and affiliates.
33
Chapter 4: ANSYS ASAS, ANSYS AQWA, FEMGV
•
ISO19902 Code of Practice implemented – The code checking for structural steel frames has been
extended to include member, dented member, and joint checking to ISO 19902.
•
On line documentation – The documentation for the code checking module BEAMST is now available
from the ANSYS on-line help system
4.3. ANSYS AQWA
The Following New Features Provide Extended Capabilities in ANSYS AQWA:
The following new features are available in release 12.1 of ANSYS AQWA:
•
Increased length of file path – The maximum total length of path + filename has been increased to
256 characters. The maximum length of the individual file name is still 32 characters (28 plus .DAT extension).
•
Improvements in Cable Dynamics – The cable dynamics initial static solution has been made significantly
more accurate and robust and should no longer fail with the message: CABDYN:STATIC SOLN FAILED
TO CONVERGE LINE: nn.
•
Multiple line breaks – It is now possible to use more than one LBRK card in an AQWA-DRIFT/NAUT
analysis. In addition you can specify a breaking tension as well as a breaking time.
•
Equilibrium position when un-converged – AQWA-LIBRIUM will now write the structure positions and
articulation reactions after the final iteration to the .EQP file, even if the run did not converge. The same
warning message as previously, that the run has not converged, will be issued. This final position may
then be used as the starting position for a subsequent analysis.
•
Increase in maximum number of elements – Recognizing that the amount of memory in computers
is increasing, the limits on the maximum number of elements and nodes have been raised by approximately 50%. The new limits are:
Overall maximum number of elements
18000
Maximum number of diffracting elements
12000
Maximum number of nodes
22000
•
AGS plot options now persistent – Selected plot options were often lost when importing new models
requiring them to be reset each time. Most plot options are now persistent and will retain existing selections when a new model is imported or updated.
•
Change of node numbering in mesh generator – In previous versions of the AGS, when the mesh
generator was used to create an AQWA model the nodes at each frame started with '01' at the keel.
E.g. nodes on frame 7 would be numbered from 701, nodes on frame 19 would be numbered from
1901. This method limits the number of nodes around a frame to 100, which occasionally caused a
problem. Now that the limit on the number of elements has been raised the numbering system has
been changed, and now node numbering is continuous for all frames.
Note that as of the 12.0 release, the Graphical Display Window in the AQWA GS can now be re-sized using
the conventional Windows buttons in the top right corner.
34
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of ANSYS, Inc. and its subsidiaries and affiliates.
4.4. FEMGV
The Following New Behavior is Seen in AQWA:
Hydrodynamic Diffraction (AQWA) [formerly named AQWAWB]
New Hydrodynamic Diffraction System in Workbench – At the 12.0 release a Workbench style interface
was developed for AQWA called AQWAWB. This was a standalone module that had the same look and feel
of other Workbench products, and could utilize geometries generated by DesignModeler. At 12.1 AQWAWB
has been fully incorporated as a system in ANSYS Workbench called Hydrodynamic Diffraction, so is now
available directly from the Project Schematic. This offers additional benefits, including direct linkage to ANSYS
DesignModeler importing of external CAD geometry, and facilitates the use of geometric parameterization.
AQWAWB is not available in this release and is replaced by the Hydrodynamic Diffraction system. The following
additional features have been incorporated into the Hydrodynamic Diffraction system:
•
Air gap visualization – Contour plotting of air gap values has been included as an option in the Pressures
and Motions results object.
•
Additional stiffness matrix definition – An additional stiffness matrix may now be defined for inclusion
in the radiation/diffraction analysis.
•
Frequency independent additional damping matrix definition – At release 12.0 only the diagonal
terms for roll and pitch could be defined. This has now been extended to allow the full 6x6 matrix to
be input for frequency independent additional damping.
•
Frequency independent additional added mass matrix definition – The full 6x6 matrix for frequency
independent added mass may now be defined.
•
User specified metacentric heights – The hydrostatic stiffness in the hydrodynamic database can be
modified to a user specified value creating additional stiffness automatically. This is achieved by specifying
the required GMX and GMY (about the global X/Y axis).
•
Automatic detection of submerged structures – If a structure has no elements at or above the water
line then this is now automatically detected and appropriate action taken with the solution. This may
be overridden if required.
•
Optional program controlled frequency range – By default the program will automatically generate
equally spaced frequencies between a lower limit based on the water depth and an upper limit based
on the mesh density. The number of frequencies can be specified by the user.
4.4. FEMGV
No changes in the 12.1 release.
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
35
36
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
Chapter 5: AUTODYN
5.1. Introduction
This section introduces the new features available in ANSYS AUTODYN release 12.1.
Please also refer to the ANSYS Workbench release notes for new features relating to the Workbench systems:
•
AUTODYN
•
Explicit Dynamics (ANSYS)
Full details of the new features are described in the “What’s New in version 12.1” section of the AUTODYN
on-line help system.
5.2. ANSYS AUTODYN Enhancements
5.2.1. Efficiency Improvements
The overall efficiency of serial and parallel simulations involving 3D unstructured Parts has been improved
at release 12.1. Observed speed-ups, on a number of different models, range from 1.2 to >3.0. These speedups are a result of several enhancements:
•
Timestep calculation optimization
•
Material processing optimization for selected material models
•
Contact search optimization
5.2.2. Bonded Connections With Line Bodies
Parts containing beam elements can now be included in bonded connections with surface or volume bodies
using the body interaction object.
5.2.3. Bonded Connections With DCR Contact Method
The discrete contact response contact method can now be used in models containing bonded connections.
5.2.4. 2D Unstructured Volume Solvers
A new generation of 2D mesh based Lagrangian volume solvers is now available in the AUTODYN component
system. This includes quadrilateral and triangular volume elements.
Note that the 2D capabilities in the Explicit Dynamics (ANSYS) system and the link between the AUTODYN
component system and Explicit Dynamics (ANSYS) and Meshing systems currently have Beta status. This link
may not be as stable or robust as expected in a general release version.
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of ANSYS, Inc. and its subsidiaries and affiliates.
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Chapter 5: AUTODYN
5.2.5. 2D Unstructured Interaction
The new 2D unstructured solvers can be used in combination with Lagrange/Lagrange Interactions and
Euler/Lagrange interactions with the structured multi-material and ideal gas Euler solvers. Erosion can be
used in all cases.
5.2.6. 2D Rigid Materials
2D unstructured solid elements now can be filled with a rigid material to generate rigid bodies. 2D unstructured parts filled with rigid material behave similar to 3D unstructured parts filled with rigid material.
5.2.7. Parallel 3D Multi-Material Euler Coupled to Lagrange
3D Multi-material Parts can now be decomposed over multiple slave processes (tasks) in parallel coupled
Euler/Lagrange simulations. This feature will allow coupled parallel simulations to be decomposed more efficiently and thus reduce overall simulation run times.
Note that a multi-material Euler Part must be decomposed manually and to enhance the efficiency of a
coupled calculation it is advised to place the sub-domains of the structure on the same processor as the
Euler multi-material sub-domains located in the same geometric space.
5.2.8. HP-MPI Message Passing for Supported Windows Platforms
It is now possible to run models in parallel using the HP-MPI message passing software on Windows platforms.
This message passing tool is available to all AUTODYN customers as part of the main installation of the
ANSYS 12.1 software.
Note that the HP-MPI version of AUTODYN is currently only available in single precision. It also cannot be
used with user subroutines. In future releases HP-MPI is likely to be the default/primary message passing
tool for AUTODYN on Windows platforms.
5.3. Explicit Dynamics (ANSYS) System Enhancements
The following features are enhancements to the Explicit Dynamics (ANSYS) analysis system in ANSYS Workbench.
5.3.1. Pre-Stress Initial Condition
For an Explicit Dynamics (ANSYS) system, the Initial Conditions folder now includes a Pre-Stress object to
control the transfer of data from an implicit static or transient structural analysis to the explicit dynamics
analysis. Transferrable data include the displacements, or the more complete Material State (displacements,
velocities, stresses, strains).
5.3.2. Support for Cylindrical Coordinate Systems
Displacement and Velocity boundary conditions now support cylindrical coordinate systems in the Explicit
Dynamics (ANSYS) system. The y-component of the cylindrical system defines the angular rotation or velocity
of the scoped nodes/rigid bodies.
5.3.3. Hydrostatic Pressure Load
The hydrostatic pressure boundary condition is now supported in the Explicit Dynamics (ANSYS) system.
38
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of ANSYS, Inc. and its subsidiaries and affiliates.
Tracker result filtering
5.3.4. Expressions for Pressure and Velocity Boundary Conditions
Pressure and velocity boundary conditions can now be defined as continuous functions of time in the Explicit
Dynamics (ANSYS) environment. The value of the load/constraint is extracted directly from the defined expression for each time point during the simulation (no discretization or interpolation is used).
5.3.5. Bonded Connections with Line Bodies
Parts containing beam elements can now be included in bonded connections with surface or volume bodies
using the body interaction object.
5.3.6. Bonded Connections with DCR Contact Method
The discrete contact response contact method can now be used in models containing bonded connections.
5.3.7. Analysis Settings
Double precision solver option
You now have the option to Solve Explicit Dynamics simulations using either the single or double precision
executables using the Precision option of the Solver Controls.
5.3.8. Post Processing
Tracker result filtering
Explicit Dynamics analyses typically involve a large number of time points, sometimes on the order of hundreds
of thousands. The tracker results data tends to include high frequency noise that can obscure slow rate
phenomena in low speed applications. A low-pass filtering option is now available that allows you to distinguish real trends in the data, by removing the high frequency noise. This feature can be controlled from the
Details view of a Result Tracker object.
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
39
40
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
Chapter 6: ANSYS CFX
This section summarizes the new features and incompatibilities in ANSYS CFX and CFD-Post Release 12.1.
Information about the beta features and known limitations of ANSYS CFX Release 12.1 and CFD-Post Release
12.1 can be found in the ANSYS CFX online help under ANSYS CFX, Release 12.1 > ANSYS CFX Introduction >
ANSYS CFX Release Notes for 12.1.
The new features and enhancements in Release 12.0 of ANSYS CFX and CFD-Post are described in ANSYS
CFX, Release 12.1 > ANSYS CFX Introduction > ANSYS CFX Release Notes for 12.0.
6.1. New Features and Enhancements
6.2. Incompatibilities
6.3. Known Limitations
6.1. New Features and Enhancements
New features and enhancements to ANSYS CFX and CFD-Post introduced in Release 12.1 are highlighted in
this section.
6.1.1. ANSYS CFX in ANSYS Workbench
Journaling and Scripting
Journaling is the capturing of ANSYS Workbench actions (creating a project, opening a system, and so on)
to a file. For ANSYS CFX applications, CCL and command actions are embedded within ANSYS Workbench
actions. Scripting refers to the processes of editing and running a journal file in ANSYS Workbench. With
scripting, you could, for example, implement a prescribed workflow.
Linux Support
ANSYS Workbench is supported on Linux 32 and Linux 64 on Red Hat Enterprise Linux 4, Red Hat Enterprise
Linux 5, and SUSE Linux Enterprise 10.
6.1.2. ANSYS CFX in General
Magnetohydrodynamics and Electromagnetics
Quasi-static MHD and E-MAG models (Beta features in Release 12.0) are now available. The electric field can
be either solved using the electric potential equation or specified by the user. Similarly, the magnetic field
can be either solved using the magnetic vector potential equation (including an external magnetic field) or
specified by the user. Momentum and energy sources calculated by solving these equations are automatically
included in the hydrodynamics system through the Lorentz force and Joule heating.
6.1.3. ANSYS CFX Documentation
You can find the documentation in PDF form directly from the Help menus of all ANSYS CFX components
on Microsoft Windows and on Linux systems.
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of ANSYS, Inc. and its subsidiaries and affiliates.
41
Chapter 6: ANSYS CFX
6.1.4. ANSYS CFX-Pre
There are no new features in CFX-Pre for this release.
6.1.5. ANSYS CFX-Solver
There are no new features in CFX-Solver in this release.
6.1.6. ANSYS CFD-Post
There are no new features in CFD-Post in this release.
6.2. Incompatibilities
This sections highlights differences in the behavior between Release 12.0 and Release 12.1 of ANSYS CFX
and CFD-Post.
6.2.1. CFX-Pre
Units of [s-1] have been accepted as valid by CFX-Pre, however this is in the process of being deprecated.
Occurrences of [s-1] units should be changed to [s^-1] units.
6.2.2. CFX-Solver Manager
6.2.2.1. Interpolation with Moving Mesh
If the CFX-Interpolator is used to interpolate initial values for a case with moving mesh, when Continue
History From is disabled (New Run mode), then the behavior has changed in Release 12.1. Prior to Release
12.1, the same mesh check compared the initial mesh in the Initial Values File to the mesh in the Solver Input
File. If these were the same then the mesh coordinates and displacements from the Initial Values File were
copied onto the Solver Input File, and so the run would start with the mesh in the position from the Initial
Values File, not in the position from the Solver Input File. This is generally appropriate when the CFX-Interpolator is run in Run Continuation mode (that is, Continue History From is enabled) but not usually appropriate in New Run mode. In Release 12.1 and later, if the CFX-Interpolator is run in New Run mode, then the
same mesh check is performed between the final mesh in the Initial Values File and the mesh in the Solver
Input File, and the mesh displacements and the coordinates are never copied. The behavior in Run Continuation mode is unchanged. This change can be reverted to the behavior prior to Release 12.1 by setting the
expert parameter meshdisp interp option = 3 (only by changing CCL) which forces the CFX-Interpolator to always use the initial mesh from the Initial Values File for the same mesh check independent of
the run mode. Additionally, setting meshdisp interp option = 2 forces the CFX-Interpolator to always
use the final mesh from the Initial Values File for the same mesh check.
In ANSYS CFX Release 12.0, when there was a large number of unmapped nodes, some of the unmapped
nodes were extrapolated from incorrect mapped nodes, resulting in unphysical pressure/temperature fields.
The interpolator now modifies the tree-search algorithm in order to make it more robust (but less efficient).
It is also possible to supply the parameter 'Bounding Box Tolerance' for the interpolator to attempt
to remap the unmapped nodes onto nearest source elements.
6.2.3. ANSYS CFX-Solver
The changes highlighted in this section are numerics improvements made for ANSYS CFX that are believed
to be generally helpful.
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6.2.3. ANSYS CFX-Solver
6.2.3.1. Multiphase
CFX-Solver now uses the user-specified contact area fraction for diffusion term assembly on non-overlap
GGI boundaries, rather than the local volume fractions.
An issue that could result in unphysical temperature fluctuations for Eulerian multiphase, multicomponent
flow with heat transfer and Kinematic Diffusivity specified for one or more components has been fixed.
The CFX-Solver no longer gives incorrect results when using the wall boiling model with 1-1 CHT boundaries
and thermal energy for vapor phase.
The CFX-Solver now converges when using the wall boiling model with GGI CHT, and it gives the comparable
results to 1-1 CHT when thermal energy is used for the vapor phase.
The solver enforces a hard stop when using wall boiling model with CHT and an isothermal vapor phase.
See the previous two items.
6.2.3.2. GGI Interfaces
The logic for re-intersecting stationary interfaces in moving mesh cases has been reverted to CFX Release
11.0. Those interfaces are now always intersected if they are attached to a moving domain. The necessary
re-intersection was missing if there was a subdomain mesh movement specified.
6.2.3.3. Particle Transport
A slightly wrong exponent in the Grace model has been corrected.
The Reynolds number limit in the Schiller-Naumann model has been adjusted in order to guarantee a smooth
transition of the drag coefficient between the viscous and inertial regimes.
A check has been added that prevents coupling of particles with 'real gas' fluid components.
6.2.3.4. Combustion, Radiation and Material Properties
The accuracy of the Residual Material Model has been improved for the case in which residual material is
mixing with fresh fuel. Under these conditions the improved model avoids unphysical low temperatures.
In Release 12.0, if you did not specify a tabulation temperature range when using the Redlich Kwong or
Peng Robinson real gas models, the solver used an inconsistent temperature range for Cp and Cv. This has
now been fixed.
6.2.3.5. Turbulence
An issue with the scaling coefficient of the curvature correction of two equation turbulence models has
been fixed (note that EARSM was not affected). In the user interface, you can specify a curvature correction
coefficient (Cscale) that should allow scaling of the built-in curvature correction function used for two
equation models. If there is zero physical curvature, then the curvature correction function is 1. However,
the Release 12.0 implementation would produce a curvature effect for values of Cscale not equal to 1.
This has been fixed by using a new formulation.
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
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Chapter 6: ANSYS CFX
6.2.3.6. Boundary Conditions
At inlet or outlet boundaries with artificial walls, the hybrid velocity values are now calculated as for freeslip walls (in contrast to no-slip walls). This significantly improves accuracy when the flow direction is not
normal to the boundary (for example, in a rotating domain).
6.2.3.7. Miscellaneous
The face ordering of the mesh in the CFX Solver Input file or the Initial Values file generated prior to Release
12.1 may not be the same as the face ordering in Release 12.1. The Interpolator is not able to detect any
such differences in the face ordering. If there is any change in the face ordering, you will see ERROR
#001100279 has occurred in subroutine ErrAction. when running the Partitioner. As a
workaround, select Use Mesh From Initial Values to continue the simulation and avoid potential failure in
the Partitioner or the CFX-Solver.
Issues with the Algebraic Slip Model (ASM) that could lead to unphysical temperature fluctuations have been
fixed.
The minVal and maxVal callbacks on boundaries now use conservative values, which resolves an inconsistency with areaAve and massFlowAve.
Some imposed solid motion velocity fields might not be conservative, causing overshoots and undershoots
in the temperature field. This fix turns on the mass imbalance correction by default for solid motion problems.
The side effect is that the CFX-Solver is now more sensitive to timestep size and sometimes a smaller timestep
is required. To revert to the Release 12.0 behavior, set the logical expert parameter 'solid motion
aprmas = FALSE'
In Release 12.0, integration point mass flows written to the CFX-Solver Results file (for CFD-Post) and used
internally for call-back functions (such as massflow) could be slightly wrong when solved in parallel. This
has been corrected by increasing the overlap of parallel partitions.
6.2.4. CFD-Post
This section describes procedural changes (actions that have to be done differently in this release to get an
outcome available in previous releases) as well as support changes (functionality that is no longer supported)
in Release 12.1 of CFD-Post.
File Path Syntax
When resuming a project that uses ANSYS FLUENT One-Way FSI, you cannot import previously defined loads
as the syntax for the file path has changed. The Release 12.0 syntax is:
/DATA READER/CASE:Case FFF 1 00010.dat/BOUNDARY:wallfluid
while the Release 12.1 syntax is:
/DATA READER/CASE:Case FFF 1 00010/BOUNDARY:wallfluid
Command Syntax for Objects
In Release 11.0 the syntax for commands that return results file objects was direct. For example:
getChildren("", "BOUNDARY");
CCL changes in Release 12.0 and Release 12.1 to support multi-file operations place file-dependent objects
(such as BOUNDARY) in a /DATA READER/CASE:<case name> parent. Thus, the new syntax is:
44
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
6.3. Known Limitations
getChildren("/DATA READER/CASE:<case name>", "BOUNDARY");
6.3. Known Limitations
For a list of known limitations in Release 12.1 of ANSYS CFX and CFD-Post, see ANSYS CFX, Release 12.1 >
ANSYS CFX Introduction > ANSYS CFX Release Notes for 12.1 > Known Limitations.
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
45
46
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
Chapter 7: ANSYS TurboGrid
This section summarizes the incompatibilities in ANSYS TurboGrid Release 12.1. Information about the beta
features and known limitations of ANSYS TurboGrid Release 12.1 can be found in the ANSYS TurboGrid online
help under ANSYS TurboGrid, Release 12.1 > ANSYS TurboGrid Introduction > ANSYS TurboGrid Release Notes
for 12.1.
The release notes for the remainder of TurboSystem are given at “ANSYS, Inc. Release Notes > ANSYS
Workbench > TurboSystem Release Notes (p. 17)”.
Incompatibilities
This section highlights differences in behavior between Release 12.0 and Release 12.1.
•
The Enable Hub Tip and Enable Shroud Tip settings were removed from the graphical user interface
(the object editor for a given blade of a blade set). These settings controlled the application of the hub
tip and shroud tip to a given blade of a blade set. If you require independent control of the application
of a hub tip or shroud tip to a given blade of a blade set, you may still edit the CCL for that blade (for
example, by using the Command Editor dialog box), but doing so may produce an invalid mesh near
the tip of any blade that does not have tip clearance.
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of ANSYS, Inc. and its subsidiaries and affiliates.
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Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
Chapter 8: ANSYS ICEM CFD
8.1. Highlights of ANSYS ICEM CFD 12.1
Release 12.1 comprises improved implementation of ANSYS ICEM CFD meshing technology as a standalone
application and within the ANSYS Workbench based Meshing application. The improvements in the ANSYS
Meshing application are described in the ANSYS Workbench Meshing Application release notes.
8.2. Key New Features/Improvements
ANSYS ICEM CFD 12.1 includes the following new features and improvements:
8.2.1. Workbench Readers
8.2.2. Interface Improvements
8.2.3. Linux Support
8.2.4.Tetra
8.2.5. Prism
8.2.6. Hexa
8.2.7. Multi-zone
8.2.8. BF-Cart
8.2.9. Mesh Editing
8.2.10. Output
8.2.11. General
8.2.1. Workbench Readers
•
Added ability to open ANSYS ICEM CFD project files from the Workbench project file.
–
Includes scripting command.
•
Added ability to import Workbench mesh or geometry files by selecting the Workbench project file.
•
Improved handling of named selections, subsets, etc.
•
Improved handling of multi-dimension parts.
–
Important for baffle surfaces, etc.
•
Improved file transfer from ANSYS ICEM CFD to FE Modeler as a way to get the mesh into ANSYS
Workbench.
•
Updated ACIS reader to ACIS 20.
•
Updated Parasolid reader to Parasolid 21.0.
8.2.2. Interface Improvements
•
Ability to save views to the Project file.
•
Improved “Auto Simplify” display settings.
•
Improved “Color by Quality” display contrast for volume elements.
•
Improved drag and drop for parts and assemblies in the model tree.
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of ANSYS, Inc. and its subsidiaries and affiliates.
49
Chapter 8: ANSYS ICEM CFD
•
•
Improved selection for deletion.
–
Faster selection for “all entities”.
–
Improved part by part selection.
–
Solved selection related defects.
Added “Gravity” force to the tree widget.
8.2.3. Linux Support
•
Added Workbench Readers for Linux.
•
Added Rhino3D support (import/export) for Linux.
•
Support for Exodus II mesh output on Linux 64.
•
Fixes for Linux-only defects.
–
Including the occasional segmentation error with pre-mesh on Linux 64.
8.2.4. Tetra
•
Optimized in-process memory requirements.
–
Same mesh with less memory.
•
Increased maximum number of supported nodes to 231.
•
Tetra with “part by part” option to store mesh with incremental file names.
•
Improved TGrid hookup.
–
AF (advancing front) option for Delaunay mesh method.
–
Latest TGrid Library (TGlib).
–
Works with all Delaunay controls (density, etc.).
8.2.5. Prism
•
Improved stability.
•
More consistent shell orientation.
–
Important for bocos in some solvers (CFX).
–
Including for prism quads on internal baffles.
•
Added wb-exponential growth law.
•
Ability to combine floating prism heights with set prism heights.
–
Also improved algorithm, added “transition ratio” control and improved defaults for smoother
transitions.
•
“Auto Reduction” now auto-redistributes.
•
Stair-step option can be disabled.
•
Restored use of 2D Prism (Blayer2D).
•
Fixed surface orientation error defect.
8.2.6. Hexa
•
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Improved support for very large Hexa domain files on Win64.
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of ANSYS, Inc. and its subsidiaries and affiliates.
8.2.9. Mesh Editing
•
Added “Visible” option for Reset associations.
•
Ability to copy edge bunching from the selected reference edge to specific edges.
–
When used with scripting, the option lists the from_edge and the to_edge.
•
Added option to convert unstructured Hexas with collapsed edges into pairs of pyramids (more blocking
flexibility).
•
Added display option to toggle between all faces and just boundary faces (easier selection).
•
Inherited distribution for new Hexa splits.
•
Ability to link spacing during the “Match Edges” command.
•
Improved re-scaling O-grid.
•
Improved Query Edge/Info (most import info is last).
8.2.7. Multi-zone
•
Improved Sweep functionality.
–
Including 2D to 3D rotate with axis elements
•
Continued improvements to block type conversion.
•
Better selection handling and display.
•
Improved integration of TGrid Tetra fill.
•
Improved parameter settings and defaults.
•
Improved block/face/mesh type conversion.
•
Prism quality now included in pre-mesh histogram.
•
Added parallel smoothing for Multi-zone Hexa.
8.2.8. BF-Cart
•
Added Key Point Blocking.
–
Creates Cartesian planes based on key points in the model.
–
Tolerance specifies the minimum distance between adjacent grid lines.
•
Added progress bar.
•
Added body by body inflation
8.2.9. Mesh Editing
•
Improved Redistribute Prism.
–
Works with imported mesh.
–
Works with Hexas.
•
Increased maximum importable/editable model size to 231.
•
Added Mesh Expansion criterion for CFX.
–
Node centered CFX formulation.
•
Improved histogram min/max range defaults.
•
Edit Mesh > Refine selected.
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Chapter 8: ANSYS ICEM CFD
–
•
Select by parts.
Smoothing to increase min edge length.
–
Laplace-based scheme tries to equalize edge lengths locally.
•
Laplace Volume Smoothing.
•
Notification when the smoother is no longer effective (residuals).
8.2.10. Output
•
Added output to:
CGNS 3.0 (ADF and HDF5)
KIVA-4 (unstructured)
•
Improved/updated output to:
FLUENT
ANSYS
Popinda
Precise
Fire V8
USM3d
WindMaster
FlowCart
•
Restored functionality to select specific domains for export to multi-block solvers.
•
Licensing issues sorted out for Exodus, IDEAS, Radioss, AUTODYN.
8.2.11. General
•
Tetin files are cleaned on save.
–
Improved Edit > Shrink tetin file option.
•
The define_family parameters are saved/read with the Tetin file
•
Fixed Undo for several commands including after split internal walls.
•
Improved the Help content and browser.
•
Improved licensing checks to be faster through the interconnect.
•
Improved licensing checks for FEA output formats.
•
Support for import of 2D Plot3D files.
8.3. Known Incompatibilities
The following incompatibilities with prior releases of ANSYS ICEM CFD are known to exist at Release 12.1:
Tetin File Format Change
There are some differences in the Tetin file format at Release 12.1, particularly with respect to some of the
mesh parameter settings.
ANSYS ICEM CFD 12.1 can read all older native file formats.
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Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
8.4.2. Demo Room
To make sure an R12.1 Tetin file can be read back into an older version of ANSYS ICEM CFD, use the File >
Save Geometry As Version... > Version 10 File option. The Version 10 file can be read into any later ANSYS
ICEM CFD version, including 11.0 and 12.0.
If you do not have version 12.1 available, the changes can also be made by removing certain lines using a
text editor. Please contact technical support for assistance.
8.4. Documentation
All documentation for ANSYS ICEM CFD 12.1 is accessible using the Help menu. Please contact us if you
would like to attend training. Please visit the ANSYS ICEM CFD website for more information.
8.4.1.Tutorials
8.4.2. Demo Room
8.4.1. Tutorials
The tutorials, input files, as well as the solved tutorials are available at http://www.ansys.com/tutorials.
8.4.2. Demo Room
Additional demos can be found at the ANSYS Demo Room.
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of ANSYS, Inc. and its subsidiaries and affiliates.
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Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
Chapter 9: ANSYS CFD-Post
This chapter summarizes the new features and incompatibilities in CFD-Post Release 12.1. Information about
the beta features and known limitations of CFD-Post Release 12.1 can be found in the ANSYS CFX online
help under ANSYS CFX, Release 12.1 > ANSYS CFX Introduction > ANSYS CFX Release Notes for 12.1.
9.1. New Features and Enhancements
There are no new features in CFD-Post in this release.
9.2. Incompatibilities
This section describes procedural changes (actions that have to be done differently in this release to get an
outcome available in previous releases) as well as support changes (functionality that is no longer supported)
in Release 12.1 of CFD-Post.
File Path Syntax
When resuming a project that uses ANSYS FLUENT One-Way FSI, you cannot import previously defined loads
as the syntax for the file path has changed. The Release 12.0 syntax is:
/DATA READER/CASE:Case FFF 1 00010.dat/BOUNDARY:wallfluid
while the Release 12.1 syntax is:
/DATA READER/CASE:Case FFF 1 00010/BOUNDARY:wallfluid
Command Syntax for Objects
In Release 11.0 the syntax for commands that return results file objects was direct. For example:
getChildren("", "BOUNDARY");
CCL changes in Release 12.0 and Release 12.1 to support multi-file operations place file-dependent objects
(such as BOUNDARY) in a /DATA READER/CASE:<case name> parent. Thus, the new syntax is:
getChildren("/DATA READER/CASE:<case name>", "BOUNDARY");
9.3. Known Limitations
For a list of known limitations in Release 12.1 of CFD-Post, see ANSYS CFX, Release 12.1 > ANSYS CFX Introduction
> ANSYS CFX Release Notes for 12.1 > Known Limitations.
Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
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Release 12.1 - © 2009 SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
Chapter 10: ANSYS FLUENT
10.1. Introduction
ANSYS FLUENT 12.1 contains primarily bug fixes and a limited number of new features. The sections that
follow provide information on new features, supported platforms, limitations that no longer apply, and updates
that affect code behavior. Information about the known limitations of FLUENT 12.1 can be found in the online
documentation. The documentation can be found by selecting the More Documentation... item from the
FLUENT Help menu.
If you would like to access a PDF file of the ANSYS Release 12.0 Release Notes, click here.
Note
FLUENT 12.1 will now be installed under ANSYS Inc/v121/fluent on Windows and ansys_inc/v121/fluent on Linux and Unix platforms.
10.1.1. Installation Procedures for FLUENT (Windows and UNIX/Linux Platforms)
Instructions for installing FLUENT are included in the ANSYS Installation documentation. This documentation
is included in the ANSYS Documentation package. Please view the FLUENT Product Page on the User Services
Center (www.fluentusers.com) for more information.
If you have used FLUENT Launcher for FLUENT 6.3 or FLUENT 12, you will need to reset the default values
in FLUENT Launcher as described in the documentation for using FLUENT in Workbench, available from
the ANSYS FLUENT 12.0 Documentation page.
10.2. New Features
New features available in FLUENT 12.1 are listed below.
•
•
Licensing
–
Support for ANSYS HPC “pack” licensing
–
Support for ANSYS physics-neutral licensing
Mesh
–
•
Ability to append large meshes in serial with low memory overhead to create a single mesh for the
parallel solver
Graphical User Interface
–
Ability to launch ANSYS FLUENT 12.1 on Linux from Windows
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Chapter 10: ANSYS FLUENT
10.3. Supported Platforms
Platform/OS levels that are supported in the current release are posted on the User Services Center
(www.fluentusers.com).
10.4. Known Limitations
Information about the known limitations of FLUENT 12.1 can be found in the online documentation. The
documentation can be found by selecting the More Documentation... item from the FLUENT Help menu.
10.5. Limitations That No Longer Apply in FLUENT 12.1
•
The NOx pollutant models are no longer separately license managed
10.6. Updates Affecting Code Behavior
•
PLOT3D results file import is no longer supported. This feature has been removed from the interface.
•
The scaling of the wave number in the spectral synthesizer algorithm has been changed for both the
inlet LES boundary condition and in the algorithm for patching a RANS solution.
•
The Help menu items User Services Center... and Online Technical Support... have been removed
and replaced with the Online Technical Resources... menu item, pointing to the ANSYS Customer
Portal.
•
The 2-D frictional viscosity law using the Schaeffer formulation has changed, affecting wall shear stress
values in Eulerian granular cases with the frictional viscosity option enabled.
•
Node values are now used in computing custom field function reports on surfaces and will yield improved
results.
•
Changes in the symmetric drag law give different results for mass flow rates. This will primarily affect
multi-fluid VOF cases.
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of ANSYS, Inc. and its subsidiaries and affiliates.