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Axis boundary condition ???

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Old   March 9, 2017, 07:00
Question Axis boundary condition ???
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Anh
Join Date: Sep 2014
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Hi everyone,

I am modeling the flow pass cylinder conical headform. The axis symmetric boundary is used.
So I set the normal velocity at axis is zero and the normal derivative of variable other than normal velocity is zero.
However, those boudary look like summetric plan boundary.

Could anyone suggest the boundary for this type?
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