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LES with wall functions, wall boundary, Re 10000

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Old   July 5, 2007, 09:01
Default LES with wall functions, wall boundary, Re 10000
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subba
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Hi There,

I am planning for LES with wall functions for flow over a 3D inf cylinder, Re 10000, with CFX11. I am not very sure how many points I have to use in boundary layer, near to the cylinder, for these models in CFX11. If you have an idea, Could you please give me a good reference?

Is there any other better turbulence model for this kind of simulation?

Thank you very much in advance.
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Old   July 7, 2007, 06:51
Default Re: LES with wall functions, wall boundary, Re 100
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Glenn Horrocks
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Hi,

I assume you are trying to model the wake structures. The SAS model in CFX does a pretty good job of this type of flow. However, expect to do plenty of validation work to get it accurate.

Glenn Horrocks
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Old   July 9, 2007, 03:59
Default Re: LES with wall functions, wall boundary, Re 100
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subba
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Hi Glenn, Thanks for information. Any sort of reference for SAS model and grids would be greatly appreciated. Thanks again.

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Old   July 9, 2007, 18:24
Default Re: LES with wall functions, wall boundary, Re 100
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Glenn Horrocks
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Hi,

There are some papers on the CFX Community site about it. Also ask your CFX rep as they will probably have some additional stuff on it.

Glenn Horrocks
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Old   July 10, 2007, 05:04
Default Re: LES with wall functions, wall boundary, Re 100
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subba
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Hi Glenn,

Thank you very much!
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