The effect of momentum source on AV flow and concentration
 

Hi,

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.

Can you post some images of what you are modelling?

Hi ghorrocks, sorry for my absence, due to some problem I was not around my work last week. Thanks so much for your interest on my problem. I post the geometry of my modelling as a profile.

The delay does not worry me, no need to apologise.

I cannot see the geometry you have posted. Where have you put it?

Okay, will not apologies again, haha...don't know why the post is not visible...let me try again. Look below. the wall bisecting the fan and the AV generator is type symmetry.