Question

Which of these equations is/are obtained from the continuity equation?

(a) Both the pressure and velocity-correction equations

(b) Velocity-correction equation

(c) Pressure-correction equation

(d) Density-correction equation

This question was addressed to me in an internship interview.

My question is from Incompressible Flows in section Incompressible Flows & Compressible Flows of Computational Fluid Dynamics

Answer 1

Correct option is (c) Pressure-correction equation

To explain I would say: The equation for the pressure correction arises from the discretized continuity equation. It contains a source term which is the result of the continuity imbalance from the incorrect velocity field.