Q.40. Which combination of the following statements about steady incompressible forced vortex flow is correct?
P : Shear stress is zero at all points in the flow. Q : Vorticity is zero at all points in the flow. R : Velocity is directly proportional to the radius from the centre of the vortex.
S : Total mechanical energy per unit mass is constant in the entire flow field.
(A) P and Q
(B) R and S
(C) P and R
(D) P and S
Answer: (B)
Explanation:
