Fluids

Fluids

Regarding DEFINE_SR_RATE udf in porous zone, where reaction to take place only in porous zone. ?

    • ajithjec
      Subscriber

      Hai, In my 3D model, methane steam reforming reaction by catalyst, 3 equations are there. The catalyst layer was considered as porous zone with porosity and surface to volume ratio. I want reactions to enable only in porous zone (reactions only in surface area in porous zones). Iam using udf  DEFINE_SR_RATE, also the command " if (FLUID_THREAD_P(t) && THREAD_VAR(t).fluid.porous) " so that only reaction rate defined in porous zone. For using  DEFINE_SR_RATE i need to enable volumetric and wall surface options in species transport model. I done that. In next step the reactions are inputted (stoichiometric coeffs.). In the reactions window for the three reaction inputting window, there is and option to select volumetric, wall surface, particle surface. ( sample of the same window from internet attached below for reference )

    • ajithjec
      Subscriber
      When enabling the wall surface in the reaction type. During iteration Warning:Zero number of gas phase reactions appears. Does I am doing anything wrong. Or since there is no reaction in gas phase for my case ( only reaction in porous surface), this warning can be neglected?n
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