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Periodic boundray with compressible flow

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Old   July 11, 2008, 10:40
Default Periodic boundray with compressible flow
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cfdIsMad
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Hi

I wanna run a LES compressible flow with periodic boundaries. Can anyone suggest how do I go about that? I can create a long duct and obtain a fully developed flow and then use inlet profile for my actual duct, but I think this will not give me good results. I want to use periodic boundary. Is there a way to do that in CFX?

Thanks
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Old   July 11, 2008, 20:31
Default Re: Periodic boundray with compressible flow
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Rogerio Fernandes Brito
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where do u want to use these periodic boundaries? (top/bottom or front side and back side parts of your geometry?) why donīt u use a profile data of components of your velocities from the literature?
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Old   July 12, 2008, 05:18
Default Re: Periodic boundray with compressible flow
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johnny
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Typically, I don't think it's recommended to use LES with periodic or symmetry boundaries. By adding these boundary types, you will be overconstraining the turbulence.
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Old   July 12, 2008, 09:57
Default Re: Periodic boundray with compressible flow
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cfdIsMad
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Thank you for your answers. I need to get fully developed flow in my channel, thats why I wanna use periodic boundary. Rogerio, can you please explain what do you mean by literature velocities. How can I obtain those? Thank you

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Old   July 12, 2008, 11:01
Default Re: Periodic boundray with compressible flow
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Rogerio Fernandes Brito
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www.sciencedirect.com => literature velocities => articles
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