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4 cards from this section. Quick, good the night before a test.
What is the formula for boundary layer thickness (δ)?
Think about the relationship with Reynolds number.
Define wall shear stress.
Relate to Newton's law of viscosity.
What does the boundary layer thickness (δ) depend on?
Consider the equations we derived related to δ.
True or False: The wall shear stress is directly proportional to the velocity gradient at the wall.
Relate τ₀ and du/dy to remember.
Given a flat plate of length 2m, water flowing with velocity 0.1m/s, and viscosity 0.001 Pa·s, derive δ and τ₀.
Use δ = 5.48x/Re_x to find layer thickness and τ₀ through viscosity.
Calculate the drag force for a flat plate of length L subjected to a shear stress of τ₀ = 0.5 N/m².
Ensure to account for plate dimensions gradually.
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