You are asked to evaluate assorted fluid flows for their suitability in a given laboratory application. The following three flow choices. Expressed in terms of the two dimensional velocity fields in the x – y plane, are made available.
P: u = 2y, v = –3x
Q: u = 3xy, v = 0
R: u = –2x, v = 2y
Which flows should be recommended when the application requires the flow to be incompressible and irrotational?
(a) P and R (b) Q only
(c) Q and R (d) R only