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Boundary conditions for rotating fan

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Old   July 21, 2008, 02:33
Default Boundary conditions for rotating fan
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rohit
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I want to know, which type of boundary conditions should be given to rotating machines case? (turbomachine). I want to simulate a cooling fan, and I want to predict performance curve then which type of boundary conditions should I chose?
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Old   July 21, 2008, 10:54
Default Re: Boundary conditions for rotating fan
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jesse
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you will use Rotating Reference Frame, that means, non-slip BC on the wall, while wall is given an rotating speed;

inlet:total pressure outlet:static pressure
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Old   July 23, 2008, 04:33
Default Re: Boundary conditions for rotating fan
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Raj
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use pressure inlet and pressure outlet boundary condition. also make fan blade as moving wall.
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Old   July 23, 2008, 04:53
Default Re: Boundary conditions for rotating fan
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rohit
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Thanks a lot buddy. But I am confused, why should we use pressure and not mass flow rate? Pls answer me.

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Old   July 23, 2008, 04:59
Default Re: Boundary conditions for rotating fan
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Raj
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yeah u can use if u know mass flow rate at inlet..

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Old   July 24, 2008, 00:26
Default Re: Boundary conditions for rotating fan
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rohit
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Hi raj, Thanks a lot. But could you tell me which one will be better (pressure or mass flow) ? And why???

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