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outflow boundary condition foe flow over a cylinder

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Old   April 29, 2010, 13:04
Post outflow boundary condition foe flow over a cylinder
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Ardalan
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For computation of incompressible 2d flow over a circle (Re=200) what kind of boundary condition can be used for outflow boundary?
As I know neuman boundary condition do not perform well because of flow unsteadiness!
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