From Prob. 4.15 the purely radial polar-coordinate flow which satisfies continuity is r = f ()/r, where

From Prob. 4.15 the purely radial polar-coordinate flow which satisfies continuity is υr = f (θ)/r, where f is an arbitrary function. Determine what particular forms of f(θ) satisfy the full Navier-Stokes equations in polar-coordinate form from Eqs. (D.5) and (D.6)