Question

In which of these approaches is the pressure force treated as a body force?

(a) Finite volume method – non-conservative approach

(b) Finite volume method – conservative approach

(c) Finite difference method – conservative approach

(d) Finite difference method – non-conservative approach

The question was asked in an interview for internship.

The query is from Incompressible Flows topic in section Incompressible Flows & Compressible Flows of Computational Fluid Dynamics

Answer 1

Right choice is (b) Finite volume method – conservative approach

For explanation: In the general integral form of the conservation equations, the pressure force is taken as a volume integral. While using the finite volume method, this is changed into a surface force by using the Gauss-Divergence theorem.