a. Consider a 2D, steady, incompressible flow, with 0 ( , , ), rV andV V r t ? ? = = ? in polar coor

a. Consider a 2D, steady, incompressible flow, with 0 ( , , ), rV andV V r t ? ? = = ? in
polar coordinates. This is purely circular flow. Determine the general form of Vq
for
i. this flow to be physically realizable, and
ii. in addition, for it to be irrotational. Is it irrotational every where?
b. Repeat (a) for the purely radial flow ( , , ) 0, r r V V r t andV?
= ? = In this case
determine Vr.