Question

In which of these terms of the momentum equation will the correction have no impact?

(a) Diffusion terms

(b) Source terms

(c) Velocity terms

(d) Surface flux terms

The question was asked at a job interview.

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

Answer 1

The correct option is (d) Surface flux terms

The best I can explain: Corrections based on the surface fluxes become zero when the solution converges. The other terms of the momentum equation do not become zero here. Therefore, the surface fluxes have no impact on the final solution.