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Old   March 13, 2008, 11:10
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natali
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I need create boundary conditions for a face but this boundary conditions depend of a pressure. I have a pressure with a sin function. So I need: when pressure is negative la surface is a wall but when de pressure is positive la surface is an exit of gas an escape. Can you help me???? it's urgent
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Old   March 13, 2008, 12:44
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Dave
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I'm not aware that Fluent can model this using its standard boundary conditions - you might need to code it as a UDF. Although I have experience at writing UDFs I would not know how to change boundary condition types while Fluent is running.
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Old   March 13, 2008, 12:52
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natali
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ok thanks but i just want to know how i can assign types of boundary conditions like walls or pressure with UDF. F_FUITE (f,thread)= wall???? or somethings like that????
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Old   March 13, 2008, 13:57
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mAx
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If your BC is unsteady, then you can change the type of your BC, by using a dynamic mesh fonctionnality. (events) I never used it, but I think you can do something with that. http://www.engres.odu.edu/Applicatio...e403.htm#58606

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