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4 cards from this section. Quick, good the night before a test.
Define laminar flow in one sentence.
Think about how fluids move without turbulence.
What does shear stress represent in fluid dynamics?
Consider forces acting in layers.
What characterizes laminar flow?
Think about the movement of layers in the fluid.
In laminar flow, at which point is the velocity maximum?
Visualize how fluids move between solid boundaries.
Two parallel plates are 0.05 m apart, and the maximum velocity of oil flowing between them is 0.5 m/s. If the viscosity is 0.9 Pa.s, derive the pressure gradient in the flow.
Start with the relationship between average and maximum velocity.
For a given fluid with shear stress at the wall of 100 Pa and a gap of 0.1 m, calculate the maximum velocity if viscosity is known to be 1.5 Pa.s.
Recall that tau = mu * du/dy and consider that you can express du/dy in terms of max velocity.
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