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Old   July 29, 2006, 07:46
Default Urgent: Boundary condition
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I want to simulate a turbulent flow in a rectangular channel, at the outflow boundary, zero-gradient conditions are imposed for all dependent variable. Which is the condition which I must use: pressure outlet or outflow?
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Old   July 29, 2006, 14:36
Default Re: Urgent: Boundary condition
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i think pressure flow BC would be more suitable for incompressible flow as u are using the 0-gradient conditions, outflow BC are used where information about the velocity & press are not know at the outlet of the sytem
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