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Old   November 18, 2003, 18:10
Default UDF boundary condition
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I am working on UDF.One thing puzzles me about BC. I add a user-defined scalar transport equation in FLUENT. And the boundary condition of UDS is a function of the velocity.

I wondering if the boundary profile will be updated every iteration or every time step?

Many thanks.

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Old   November 20, 2003, 11:54
Default Re: UDF boundary condition
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In my point of view, the boundary profile should be updated per time step when unsteady model is used. I think you should try to use the function DEFINE_ADJUST which is excuted at the beginning of each iteration.

good luck.
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Old   November 20, 2003, 17:15
Default Re: UDF boundary condition
Ajay Rao
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The new version of FLUENT (6.1.22) has DEFINE_AT_END which updates UDF automatically at the end of each time step for unsteady and end of each iteration for steady case.

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