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Distanne September 7, 2004 06:49

LES energy levels
 
I have a really basic LES code. would any one be able to tell me how I can evaluate if my grid is fine enough.

how can I be sure that my cut-off is in the invariance energy range? what outputs of energy could I get from my code to help me know this?

any input would be great. thanks.

Apurva September 7, 2004 07:49

Re: LES energy levels
 
When solution has progressed a bit check your y+. Visit this site for viscous grid spacing calculation http://geolab.larc.nasa.gov/APPS/YPlus/

y+ value for les calculation should be less than 1 for LES.

Hope it helps

Distanne September 7, 2004 08:39

Re: LES energy levels
 
hi, thanks for your response.

i was thinking more about away from regions in an unconfined flow.

how can i be sure my filter width is in my invariant energy range?

thanks.


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