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Old   June 5, 2003, 06:31
Default UDF Source Term
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I created a tangential source term by an udf for a axissymmetric swirl, and the quality of the streamfield is what I expected, but the the quantity of velocity is much to high. The Units of the source term i already checked... and now I have no idea what to do, is it nessescary to implement the Volumes of the cells, or weigth in the udf.... because i dont know how exact fluent handles with the source term in the momentum equations?

If anybody knows something about that ... please tell me.

Regards, Christian.
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Old   June 5, 2003, 07:08
Default Re: UDF Source Term
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The source terms are normally related to 1m -> unit should be kg/ms for the mass for example.
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Old   June 5, 2003, 22:00
Default Re: UDF Source Term
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Does the new source term replace the previous one or add or substract... ??? Anyone can help us?

Hi Christian, check the direction or sign of every terms.


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Old   June 8, 2003, 17:14
Default Re: UDF Source Term
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A source term has to be referred to the unit volume (1 m^3) and is added or subtracted (it depends on its sign) to the standard equation implemented by FLUENT.


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Old   August 1, 2009, 05:53
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siva kumar
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can u send that swirl udf file....i will checj\k ,,,i will the wat is the prob in ur code.........send to me...
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