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intel and outel in teh same boundary

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Old   June 3, 2011, 12:21
Default intel and outel in teh same boundary
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I have a cavity with a single enter.
So this enter is inlet and outel. I want to input a function field on the pressure, like Pinlet=cos(time), Poutlet=-cos(time).
But how can set these conditions on the same boundary?

I hope that my english is not so bad, and that you can understand me

Thanks for your help.
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Old   July 10, 2011, 06:37
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Either you split up the boundary (strongly recommended), or you can modify your field function (NOT recommended) to something like


You can also add some more conditions like $$Position[0] (x-direction), $$Position[1] (y-direction) etc.
When you need a circular split up, you might think about using $$Position[] in a cylindrical coordinate system. See the field function programming reference.
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inlet outel pressure

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