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Old   October 24, 2009, 22:22
Smile question about uds
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Tanwei
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hello,everyone. I am new to Fluent. Here I have a question.

I have added an UDS(potential) . But I confused when I imposed the BC. There are two type of BC for UDS. One is "Specified flux",and the other is "Specified value".

And what I know is that "Specified flux" means "-diff*(grad(potential))".

Here is my question!

As for insulating wall, we should choose the BC with "Specified flux" equal to zero. Is it right?

Another question is that I imposed a constant current on another boundary, and this time how should I set the value of "Specified flux"?


Additional, Specified flux=-diff*(grad(potential)).

current density=-diff*(grad(potential)).

with the above two equations,

we can conclude that "Specified flux=current density", is it right?
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Old   October 27, 2009, 09:55
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Tanwei
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Is there anyone who can help me or give me some suggestion?
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Old   July 5, 2015, 11:22
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xing lu
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Hi dear, I encountered the same problem as yours.
How did you set the specified flux for your potential by UDF?
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current, current density, potential, specified flux, uds

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