Question

Which of the following is correct regarding the cell numbered “13”?

(a) aE=0; aW=0

(b) aW=0; aN=0

(c) aN=0; aS=0

(d) aS=0; aW=0

I got this question by my college professor while I was bunking the class.

The doubt is from FVM for Multi-dimensional Steady State Diffusion topic in division Diffusion Problem of Computational Fluid Dynamics

Answer 1

Right answer is (d) aS=0; aW=0

Explanation: For the control volumes adjacent to the boundary of the global domain, the boundary-side coefficient is set to zero. Therefore, for the cell numbered “13”, the southern and the western coefficients are zero (aS=0; aW=0).