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Forum: Main CFD Forum

April 8, 2015, 03:55

Replies: 57

LES vs RANS

Views: 52,754

Posted By lin

Thanks for your reply. From the definition,...

Thanks for your reply.

From the definition, they indeed have the different meaning. But the final form of the averaged equations (URANS) and filtered equation (LES) are nearly identical, except...

Forum: Main CFD Forum

April 7, 2015, 20:47

Replies: 57

LES vs RANS

Views: 52,754

Posted By lin

I have the same question. For one specific...

I have the same question. For one specific problem, I can use the same grid sizes for URANS and LES. Which one to choose, URANS or LES?

Forum: Main CFD Forum

January 25, 2011, 20:08

Replies: 57

LES vs RANS

Views: 52,754

Posted By lin

Thanks for your explanation. Personally I accept...

Thanks for your explanation. Personally I accept the idea that DNS need finer grid than LES, LES needs finer grids than RANS.

The main problem for me now is , for a specific simulation, how to...

Forum: Main CFD Forum

January 23, 2011, 19:44

Replies: 57

LES vs RANS

Views: 52,754

Posted By lin

Thanks Florent for your explanation. LES is...

Thanks Florent for your explanation.

LES is the field I have never tried, but on my todo list in the near future. Surely I have to do more reading. Your post helps me a lot.

From the limited...

Forum: Main CFD Forum

January 23, 2011, 05:33

Replies: 57

LES vs RANS

Views: 52,754

Posted By lin

Thanks for your explanation. I guess the...

Thanks for your explanation.

I guess the main problem for me is that for all the books I have read, "LESs grid must be better than RANs".

But for some journal articles I have read, say,...

Forum: Main CFD Forum

January 22, 2011, 04:55

Replies: 57

LES vs RANS

Views: 52,754

Posted By lin

I'm also confused by RANS and LES. If the...

I'm also confused by RANS and LES.

If the grid size is the same, then what's the difference?

It seems that everybody says that LES need higher resolution grid than RANS, but I did not get a...

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