1
Do you still remember?
• Fluid
• Mechanics
•
Fluid dynamics
•
Fluid statics
•
Stress – tensile, compressive, shear
•
Shear force, shear strain
•
Newton’s law of viscosity
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•
Ability to resist deformation?
If
YES
let’s move on……….
Lecture 2 Week 1
Fluid Properties
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Viscosity & kinematic viscosity
Density, Specific volume, Specific weight, Specific gravity
Surface tension, Pressure

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2
Viscosity
Property that determines the amount of resistance to shear force.
Due primarily to interaction between fluid molecules
F
y
U
V
Fluid
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Fluid is filled between plate
To keep plate moving at constant velocity, U
a constant force, F must be applied
Viscosity
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y
AU
F
α
dy
dV
A
F
α
dy
dV
α
τ