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Old   March 8, 2009, 17:06
Default Cannot find macros for some terms (UDF)
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I am trying to add a source term to the turbulent kinetic energy dissipation equation. Unfortunately there are some terms I don't know how to add.

For instance, is there any macro to get the velocity derivative in time? I know it is easy to create myself but I want it to depend on the time discretization scheme (I know, it is not that difficult).

Second of all, is there a direct macro for the turbulent production? It seems quite annoying having to play with the S tensors...

Thank you for your help!
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Old   March 9, 2009, 06:55
Default Re: Cannot find macros for some terms (UDF)
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I found a bigger problem: I cannot access the value of turbulent kinetic energy at the previous time step! Any ideas?

Thank you.
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