Question

To overcome the disadvantage caused by the information from the wrong side of cells ____________ is used in the vertex-based method.

(a) upwind biased scheme

(b) weighted average

(c) downwind biased scheme

(d) central scheme

I have been asked this question during an interview for a job.

The question is from Diffusion Problem in chapter Diffusion Problem of Computational Fluid Dynamics

Answer 1

Correct option is (a) upwind biased scheme

The explanation: The major disadvantage of using the enlarged stencil is that information from the wrong side of the face may also contribute to the weighted average while calculating the vertex values. To avoid this, the upwind biased method is used.