Does using DEFINE_SOURCE loop over boundary

- April 21, 2022 at 1:36 pm
  
  Chinchedu
  Subscriber
  
  Hi, in Ansys UDF manual it's written that "source term UDFs (defined using DEFINE_SOURCE) are called by ANSYS Fluent from within a loop on cell threads", and my question is does it even loop over boundary cells also.
  Actually I have written a UDF using DEFINE_SOURCE for mass transfer based on saturation temperature, which is a function of local pressure. And stored saturation temperature in user defined memory. But in the post-cfd, near the boundary cells my saturation temperature is changing from 0k to 350K, and through the domain it's 350K. Does it loop over boundary cells?
- April 25, 2022 at 2:42 pm
  
  Rob
  Forum Moderator
  
  It'll loop over the cells, not the facets. There is a macro to find the wall facet for a cell which might be what you're after.
- April 25, 2022 at 2:51 pm
  
  DrAmine
  Ansys Employee
  
  Always try to disable node values when checking things in Fluent. DEFINE_SOURCE does definitely loop over ALL cells.

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