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how to describe this boundary condtion in UDF?

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Old   November 25, 2011, 04:39
Default how to describe this boundary condtion in UDF?
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litter
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HI,can anyone help me?
i am now use the species transport model in FLUENT ,and i am use UDF.
how to describe this boundary condion use UDF: \partial c/\partial y=0

and how to describe this boundary condion use UDF:\partial c/\partial y+c=0

y is the normal vector of the boundary,c is concentration.

thank you
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Last edited by litterfree; November 25, 2011 at 04:41. Reason: have error with math formula
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