Consider the flow represented by the stream function ψ 5 Ax2 y, where A is a dimensional constant equal to 2.5 m21 s 21 . The density is 1200 kg/m3 . Is the flow rotational? Can the pressure...

Consider the flow represented by the stream function

ψ 5 Ax2

y, where A is a dimensional constant equal to 2.5

m21 s

21

. The density is 1200 kg/m3

. Is the flow rotational?

Can the pressure difference between points (x, y) 5 (1, 4) and

(2, 1) be evaluated? If so, calculate it, and if not, explain why.