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compressible flow boundary conditions

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Old   January 21, 2002, 11:34
Default compressible flow boundary conditions
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yangqing
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for compressible flow. can it lead to error that specify the inlet with vilocity inlet? i have tried a case,the residual of mass rise very fast.then disconvegence
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Old   January 21, 2002, 13:10
Default Re: compressible flow boundary conditions
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Karl
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For compressible flow a "Mass Flow Inlet" - boundary will give you better results. For the outlet boundary use "Pressure Outlet" , but you have to be careful to set proper values for the backflow values (only needed if reversed flow occurs at the outlet).
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Old   January 22, 2002, 11:19
Default Re: compressible flow boundary conditions
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yangqing
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in my case,oulet is a mechanic fan. i only know the mass flow rate, not the pressure jump. how can i specify the out boundary condition thanks
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