Question

If fluid stress is proportional to strain rate. Correlate strain rate to velocity gradient​

Answer 1

Answer:

Consider a layer of fluid between 2 plates

The top plate moves with velocity, V

V

h

B D'

'

A

B

C

D

The shape change can be written as V t / H

The rate of shape change is d/dt(shape change)

rate of deformation =  = V/H (units of 1/time)