Question

What is an assumption made while considering Couette flow?

(a) Flow is unparallel

(b) No slip condition between two plates

(c) Flow is inviscid

(d) Both the plates are stationary

I got this question in class test.

The query is from Couette Flow topic in chapter Numerical Techniques for Nonlinear Supersonic Flow, Elements of Hypersonic Flow, Couette and Poiseuille Flow of Aerodynamics

Answer 1

Right option is (b) No slip condition between two plates

The best I can explain: In analyzing Coutte flow, we have two flat plates kept parallel to each other with viscous fluid contained between the two. One major assumption made is that there is a no slip condition thus resulting in no relative motion between the fluid and the plate.