Rheology and Processing of Polymers

Consider fluid flow between two parallel plates of width (W) separated by a distance (b). The bottom plate is moving with velocity (V) (parallel to itself) and the top plate is stationary. There is a constant pressure drop (P/L) applied to this fluid as well. Prove that the velocity profile in the fluid between the plates is: u(y)=2LP(y2by)+V(1by) Also do the following: (i) Plot this velocity profile for P>0 and P