Learning Forum

[vinaychandrakar11]

Hello Everyone,

I want to simulate the flow of gaseous species over the coating of catalyst. I considered a catalyst coating as a porous medium.

I am planning to solve mentioned PDE in fluent for porous domain. Equation and geometry are attached.

[DrAmine]

A) does depend if you want to account for direction dependent diffusion.
B) the terms in your equation are all built-in. If something is missing it can be added. If you want to know the background please refer to the mentioned references in the manual

C)manual is just a how to. Theory is found elsewhere.

[vinaychandrakar11]

Thanks for replying DrAmine A) Mine is isotropic diffusion so I dont think it will affect much, but if I will tick on anisotropic diffusion box then matrix appears and if its diagonal elements are 1 and other elements are zero then it would be isotropic only, right?
B) If I will not check on the anisotropic diffusion then I will not be able to choose Brinkmann option (which I want to find out the changes with and without use of anisotropic diffusion).
C) I didnt find anything about Brinkmann term in both user guide as well as theory guide. Do I have to read it somewhere elese?

[DrAmine]

A. Yes
B. No. it has noting to do with species diffusion that Brinkman viscosity.
C. 3 Keywords are enough to have some information: Brinkmann viscosity porous.

[vinaychandrakar11]

Thank You so much DrAmine for clearing my doubts.