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-   -   LES with wall functions, wall boundary, Re 10000 (http://www.cfd-online.com/Forums/cfx/24225-les-wall-functions-wall-boundary-re-10000-a.html)

subba July 5, 2007 09:01

LES with wall functions, wall boundary, Re 10000
 
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.

Glenn Horrocks July 7, 2007 06:51

Re: LES with wall functions, wall boundary, Re 100
 
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

subba July 9, 2007 03:59

Re: LES with wall functions, wall boundary, Re 100
 
Hi Glenn, Thanks for information. Any sort of reference for SAS model and grids would be greatly appreciated. Thanks again.


Glenn Horrocks July 9, 2007 18:24

Re: LES with wall functions, wall boundary, Re 100
 
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

subba July 10, 2007 05:04

Re: LES with wall functions, wall boundary, Re 100
 
Hi Glenn,

Thank you very much!


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