Swirling flow as a boundary condition
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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