Question

The Rhie-Chow interpolation is equivalent to __________

(a) pseudo-momentum equation with the coefficients linearly interpolated

(b) pseudo-momentum equation with the coefficients quadratically interpolated

(c) pseudo-continuity equation with the coefficients linearly interpolated

(d) pseudo-continuity equation with the coefficients quadratically interpolated

The question was posed to me in an interview for job.

I need to ask this question from Incompressible Flows topic in section Incompressible Flows & Compressible Flows of Computational Fluid Dynamics

Answer 1

The correct option is (a) pseudo-momentum equation with the coefficients linearly interpolated

To explain: The Rhie-Chow interpolation is used on collocated grids. It is equivalent to constructing a pseudo-momentum equation at the face. It has coefficients which are obtained using linear interpolation of the momentum equations at the centroids.