Fluids

Fluids

Anisotropic Species Diffusion term meaning in cell zone condition of Porous media

    • vinaychandrakar11
      Subscriber

      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
      Ansys Employee
      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
      Subscriber
      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
      Ansys Employee
      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
      Subscriber

      Thank You so much DrAmine for clearing my doubts.
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