Fluids

Fluids

How can I write Eddy-dissipation model in DEFINE_VR_RATE udf?

    • bruon
      Subscriber

       Hi.


       


      I have three reactions and want to use finite-rate model to two reactions and eddy-dissipation model to one reaction


      So I should use UDF, DEFINE_VR_RATE. In UDF manual, it gives an example about finite-rate model. But, there is no example about eddy-dissipation model. and I have no idea that how I implement the eddy-dissipation model.


       


      As you may know, DEFINE_VR_RATE macro returns only two values: rr for laminar and rr_t for turbulent.


      They may be used to calculate source and sink term of each species due to the reaction.


      But, the reaction rate of eddy-dissipation model is defined for "each species" in Theory Guide manual.


      What values should I return as a result of UDF in this case?


       


      Briefly, can anyone let me know how I write DEFINE_VR_RATE udf for implementing eddy-dissipation model?


       


      Thank you.

Viewing 0 reply threads
  • You must be logged in to reply to this topic.