If z is up, what are the conditions on constants a and b for which the velocity field u ay, bx, w 0 is an exact solution to the continuity and Navier Stokes equations for incompressible flow

Question: If z is up, what are the conditions on constants a and b for which the velocity field u = ay, = bx, w =

If z is “up,” what are the conditions on constants a and b for which the velocity field u = ay, υ = bx, w = 0 is an exact solution to the continuity and Navier-Stokes equations for incompressible flow?

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