Question

Which of these arrangements of the velocity and pressure gradient components is suitable for non-orthogonal grids?

(a) Staggered arrangement with covariant base

(b) Collocated arrangement

(c) Staggered arrangement

(d) Covariant arrangement

The question was asked by my college director while I was bunking the class.

I would like to ask this question from Numerical Methods topic in division Numerical Methods of Computational Fluid Dynamics

Answer 1

Correct choice is (b) Collocated arrangement

Easy explanation: The collocated arrangement is the simplest as all the variables share the same control volume. But this requires more interpolation. When the grid is non-orthogonal, the collocated arrangement is the best as the other arrangements are more difficult.