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mesh requirement for LES

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Old   February 5, 2004, 23:30
Default mesh requirement for LES
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LES generally require finer mesh compared to RANS models,if this understanding is correct, what is the acceptable mesh size in the near wall region when I am using LES for engineering problems? thanks.
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Old   February 10, 2004, 17:48
Default Re: mesh requirement for LES
frederic Felteb
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Hi there,

Usually you would want to use a mesh where y+=1 for the first point in the off-wall direction. Then depending on the type of flow, the requirement for the streamwise and spanwise directions can be more relaxed. For example, in a typical LES turbulent channel flow, you would use x+=50, z+=25 and y+=1

I hope this helps,


Frederic Felten.
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