[alimea]

Hi all
according to Verstig CFD book (and also Patankar) I want to see the effect of the discretization scheme on the results (especially diffusion error in upwind scheme and unboundedness in central scheme). For this purpose I want to solve the equation of T like:
div (phi , T) = 0
(diffusion term should be removed (to see numerical diffusion)) beside the continuity and momentum eqn. in a steady state mood with openfoam(where phi is the flux).
I have gotten the result by Upwind scheme, but unfortunately I can't solve the eqn. with central scheme! my solution become diverge.
Do you know why?
I want to compare the result of two schemes.

Thanks