How To Input Mass Sources In a Porous Matrix?

Carlos

Hi Everybody

I'm working in a cilinder, wich i've defined as a porous zone. In this work, i've an 2D axisymetric problem, with a mass flow inlet, an outflow,and the wall of the cylinder described as "wall". I've defined the 2D face as a porous zone. Despite having a very simple geometry, I've a problem - I've a mass flow inlet of hydrogen, and I want to program a source equation based on the local values of the porous matrix, to simulate the adsorption of this specie, but i'm not reaching the way to do that. I must confess that I never have done these kind of simulations before and my experience with this program is quite elementar. Can anybody help me?

Thanks Carlos V.