||June 10, 2011 19:01
The effect of momentum source on AV flow and concentration
I solve a diffusion only problem (generation of a component using a source term @ a wall boundary and diffusion of the component in fluid domain then to solid domain and in the solid domain there is a rxn ( kind of adsorption) expressed as a sink (using sub domain) and source for a component formed in the rxn. I used additional variable (AV) as a diffusing component and all works fine. But, when the same problem turned to a convective diffusive problem (by adding a momentum source (general momentum source with x component only) to represent an internal fan contained in the fluid domain) the concentration level that cfx reported looks messed (physically unexpected). what is the matter? I tried to use a converged steady state solution of the momentum and turbulence as an initial value for my transient problem, the execution goes okay but the answer I got concerning the concentration level in the fluid phase and in the solid phase looks not correct.