Fluids
S
What is a Fluid?
S A fluid is anything that has no
fixed shape and can flow. Usually
it is a liquid or a gas.
What is a Fluid?
S Each group will be assigned a type of fluid. Your job is to
come up with as many examples as you can in two minutes.
S You will be asked to share your examples with the class.
S Here are the categories:
S
S
S
S
Household Materials
Mechanical Devices
Living Things
Natural Environments
What is a Fluid?
S Household Materials
What is a Fluid?
S Mechanical Devices
What is a Fluid?
S Living Things
What is a Fluid?
S Natural Environment
Uses of Fluids
S 1) Transportation of different materials
S Fluids make it easier to move materials
even if they are solids
Uses of Fluids
S 1) Transportation of different materials
S Fluids make it easier to move materials
even if they are solids
S Slurries: A mixture of water and a solid
(like dirt and water) eg) Mining in the
Oil Sands
Uses of Fluids
S Syncrude originally used conveyer
belts to move the oils sand from the
mine to the processing plant, but found
it was way to expensive. It is now
pumped to the plant by way of a slurry
pipeline.
Uses of Fluids
S 2) Fluids take the shape of their containers.
Many solid materials are originally prepared as
fluids.
Uses of Fluids
S 2) Fluids take the shape of their containers. Many
solid materials are originally prepared as fluids.
For your information….(you don’t have to write this down…)
S Glass, steel and concrete are examples of where the
solids are processed as liquids to shape them easier, so
that when they cool or dry as a solid they are in the
solid form that they should be.
Click on the following links to watch videos.
Steel: From Start to Finish
How its made Glass
Uses of Fluids
S 3) Fluids can hold other materials (ie. in
solutions)
Uses of Fluids
S 3) Fluids can hold other materials (ie. in
solutions)
For your information….(you don’t have to write this down…)
S Toothpaste has a ‘binder’ (which is made
from wood pulp) that keeps all the
ingredients together.
Properties of Fluids
S Viscosity
S Density
S Buoyancy
S Compressibility
Properties of Fluids
S Viscosity is resistance to flow.
S Example:
S It is determined by a fluids
S Pancake syrup has
internal resistance or
friction that keeps it from
flowing.
S The greater the friction the
higher the viscosity, the
slower it will move.
S The lower the friction the
lower the viscosity the
faster it will go.
high viscosity because
it is thick
S Water has low
viscosity (runny)
Properties of Fluids
You do not have to write this down, just watch the video.
S Compare the viscosity of
fluids and describe how
temperature can affect
changes on liquid
fluids…
S http://www.youtube.c
om/watch?v=LPqdEz
HyNWM
Properties of Fluids
S As temperature increases,
speed increases, viscosity
decreases
Properties of Fluids
S As temperature increases,
speed increases, viscosity
decreases
S As temperature
decreases, speed
decreases, viscosity
increases
Properties of Fluids
You do not have to write down the question, only your answer.
S Ashley was helping her father change the oil in their
van. After they had drained the old oil and replaced
the filter, Mr. Jameson asked Ashley to bring him
four liters of oil from the shelf. She went to the
shelf but saw some cans labeled 5W-30 and some
10W-30. She hollered back to her dad and asked
what she should bring?
Properties of Fluids
You do not have to write down the question, only your answer.
S Her dad responded 5W-30 since its still winter.
Knowing what you know about fluids, why would
you want to have a different oil for winter and a
different one for summer?
Properties of Fluids
S To move different liquids through tubes and pipes,
the viscosity of the liquid has to be considered.
S The viscosity of the liquid determines the size of
tubes that should be used.
Properties of Fluids
You do not have to write down the question, only your answer.
1) Why are slush straw and soft-drink straws
different?
Properties of Fluids
You do not have to write down the question, only your answer.
2) Two pipelines were being put into the
ground where you live. One is a larger pipe
than the other. One is oil and one is water,
they each carry the same amount of the liquid.
Which one is which?
Properties of Fluids
For your information….(you don’t have to write this down…)
• Alberta Oil Sands: only 25% can be
extracted by conventional methods, but
75% can be extracted by lowering the
viscosity of the oil in the ground, before
trying to extract it.
• Fluids move across the country in
pipelines. Heaters are used to control the
viscosity along the pipelines
Properties of Fluids
For your information….(you don’t have to write this down…)
Cleaning products can have their viscosity
adjusted by changing the temperature…to
remove bubble gum from shoe or carpet
lower the temperature.
Use an ice cube to make the bubble gum
more viscous, making it easier to remove.