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3 cards from this section. Quick, good the night before a test.
What happens to shear stress in a fluid at rest?
Think about the basic properties of fluids when they are not moving.
Define hydrostatic pressure.
Consider what happens to pressure as you dive deeper in a swimming pool.
In a hydrostatic condition, shear stress is:
Recall what happens when a fluid is at rest.
Stokes' postulates state that the stress tensor is a linear function of strain rates. True or False?
Think about how viscosity relates to stress.
Given a fluid at rest with a density of 1000 kg/m³, calculate the pressure at a depth of 20 meters. How would this pressure profile change if the fluid were in motion?
Use the hydrostatic pressure formula you learned.
Consider a Newtonian fluid container. Derive the viscous stress expression for shear flow using Stokes’ postulates. Discuss the implications of varying viscosity.
Base your derivation on material properties, starting from Stokes’ definitions.
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