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?

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.

Re: LES accuracy
 

hi, thanks for answer.

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

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:
Thanks
Turbulence.