Computational Fluid Dynamics

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Computational Fluid Dynamics

Prof. L. Zovatto

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1.

Well-posed problems

Boundary conditions:

Essential or Dirichlet boundary conditions

Natural or Neumann boundary conditions

Mixed boundary conditions and initial conditions

The Cauchy problem

Solution of the D’Alembert equation

2.

Numerical methods, space discretization

Finite Elements Method (FEM)

The finite elements

Form function

Areolar coordinates

Nodal form functions

Galerkin method

Application of the Galerkin method

Assembly of the linear system

Gradients of the form functions

Finite Differences (FD)

The differential operator in discrete form

FD schemes

Boundary conditions

Stretched grids

Finite Volumes Method (FVM)

Evaluation of terms appearing in the integral equation

Assembly of the linear system

Cell Elements Method (CEM)

Poisson equation: circumcentric polygons

Poisson equation: barycentric polygons

Introduction of essential boundary conditions

Type A direct method

Type B direct method

Other methods

3.

Time discretization

Explicit methods

Euler method

Heun method

Runge-Kutta methods

Implicit methods

Predictor-corrector methods

Runge-Kutta schemes for systems of differential equations

Pseudo-exact solutions

Semi-implicit methods

Convergence

Stability analysis

Convergence order

Schemes for the Navier-Stokes equations

Consistency analysis

Fractional step in primitive variables

Advancement in vorticity-streamfunction formulation

References

1.

M. Abramowiz, I. Stegun HandBook of mathematical function. Dover Publication, 1970

2.

C. A. Brebbia. The boundary element method for engineers. Pentech Press,1980.

3.

C.Canuto, M.Hussaini, A.Quarteroni and T.Zang, Spectral Methods in Fluid Dynamics Springer

Verlag 1988

4.

Flecther C.A.J. Computational Techniques for Fluid Dynamics. Vol.1,2 Springer-Verlag, 1988.

5.

Hirsch C. Numerical Compuration of Internal And External Flows. Vol.1,2 John Wiley & Sons,

1996.

6.

D. Greenspan, V. Casulli Numerical Analysis for Applied Mathematics, Science, and Engineering,

Addison Wesley Publishing Company, 1993.

7.

W.G. Gray, D.R. Time-stepping schemes for finite element tidal model computations.. Advances in

Water resources, Vol.1 , No. 2,1977.

8.

A.R. Mitchell, R.Wait . The finite element method in partial differenzial equation. Wiley 1978.

9.

A.R. Mitchell, D.F. Griffiths The finite difference method in partila differenzial equation. Wiley

1980.

10.

Patrick J. Roache Fundamentals of Computational Fluid Dynamics. Hermosa publisher 1998.

11.

Rao. The Finite Element method In Enginnering A. Wheaton & Co. Ltd, 1982.

12.

H.K Versteeg, W. Malalasekera. An introduction to Computational Fluid Dynamics. The finite volume method. Longman Scientific Tecnichal, 1995.

13.

E. Tonti. A Direct Discrete Formulation of Field Laws: The Cell Method. Computer Modelling in

Engineering and Science, CMES, Vol. 2, No. 2, pp. 237-258, 2001.

14.

E. F. Toro. Shock-capturing methods for free-surface shallow flows. Wiley, 2001.

15.

J. H. Ferziger, M. Peri´c. Computational Methods for Fluid Dynamics. Springer , 1999.

16.

Zinkiwiecz. The Finite Element method. Mc Graw Hill, 1990.

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