porous medium
 

Dear all, I want to make a model of channel with washcoat where reaction is runnig (on the surface of catalyst particle). I made some solution, but it is not really good. When I specify the porous medium and it's properties, the diffusion of mass and temperature in porous zone is not demonstrated? I don't see any diffusion! Why? How can I describe in Fluent the diffusion in porous medium? Does anybody post here the UDF for surface reaction, I would like to describe the reaction in the washcoat by UDF, is it good or not? Please help!!!

-pepa-