Question

The guessed velocities will satisfy the continuity equation when ___________

(a) the pressure field is correct

(b) the pressure correction is correct

(c) the velocity correction is correct

(d) the pressure-correction equation satisfies the continuity equation

I have been asked this question at a job interview.

The doubt is from Incompressible Flows in chapter Incompressible Flows & Compressible Flows of Computational Fluid Dynamics

Answer 1

Correct choice is (a) the pressure field is correct

To explain: The momentum equation is solved to get the guessed pressure values. Then the velocities are assumed from this pressure field. This assumed velocity field will not satisfy the continuity equations until the pressure field is correct.