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Swirling flow as a boundary condition

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Old   November 2, 2010, 08:09
Default Swirling flow as a boundary condition
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Terry Tensinsky
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I want to simulate a flow in a pipe. my boundary condition, is velocity at the internal of the pipe. velocity has two componants: a) an unsteady axial flow
b) a steady circumferential flow.

I think it requires a UDF. I have written the UDF for the first part. it is easy.

But I don't know how can I do the second part.
Is there any one can help me ?
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