Question

How does the velocity vary in case of incompressible Couette flow?

(a) Linear

(b) Parabolic

(c) No variation

(d) Hyperbolic

This question was addressed to me in an online interview.

I need to ask this question from Couette Flow topic in division Numerical Techniques for Nonlinear Supersonic Flow, Elements of Hypersonic Flow, Couette and Poiseuille Flow of Aerodynamics

Answer 1

Correct choice is (a) Linear

To explain: The velocity variation for an incompressible Couette flow is given by:

u = ue (\(\frac {y}{D}\))

Where, ue is the velocity at y = D that is at the upper plate.

According to the formula, the flow varies linearly across the flow field.