Question

For a no-slip condition which of these about velocity components is true near the wall boundary?

(a) u=1, v=0, w=0

(b) u=0, v=0, w=0

(c) u=0, v=1, w=0

(d) u=0, v=0, w=1

The question was asked in unit test.

This question is from Boundary Conditions topic in portion Boundary Conditions of Computational Fluid Dynamics

Answer 1

The correct choice is (b) u=0, v=0, w=0

Best explanation: No-slip is the ideal condition with the highest viscosity. Here, the fluid is relatively stationary with the wall and all of the velocity components are zero. Therefore, u=0, v=0, w=0.