Civil Engineering MCQAE Level Civil Engineering
Which of the following about viscous flow near a solid surface is correct?
Fluid MechanicsBoundary LayerMEDIUM
Choose the correct answer
A
velocity changes from zero at wall to free-stream value
B
wall shear is always zero
C
no-slip condition means wall velocity equals fluid free-stream
D
boundary layer exists only in inviscid flow
Correct Answer
A. velocity changes from zero at wall to free-stream value
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Viscosity creates a near-wall velocity gradient. Correct option: A.
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