CFD Online Discussion Forums

CFD Online Discussion Forums (
-   Main CFD Forum (
-   -   LES accuracy (

Pimia September 13, 2005 14:54

LES accuracy
i was wondering if someone could tell me about the time accuracy of LES.

what steps do we need to take to ensure the time steping is accurate enough?

and how important is the temporal accuracy?

agg September 14, 2005 10:19

Re: LES accuracy
In LES, one filters out the spatial scales and includes models to represent the physics of energy cascade from large to small scales. To maintain temporal accuracy a CFL of 0.2-0.3 is usually employed.

Pimia September 14, 2005 18:29

Re: LES accuracy
hi, thanks for answer.

is there any reason why this value of CFL is chosen?

Turbulence July 18, 2012 06:23

Hi staustrahltriebwerk :)
I had tried the refinement box thing. If my locationInMesh is in inlet pipe, then only inlet pipe remains after meshing. If my locationInMesh is in the big cylinder ,then only big cylinder remains. This is what happened in my previous runs. Any idea why? :confused:

All times are GMT -4. The time now is 02:39.