[ptsxx]

Originally Posted by dradenkovic

Hello.

I did LES Smagorinsky simulation with van Driest damping and I obtained good results, for turbulent flow in channel. Then I wanted to try dynamic model and I tried dynamicKEqn. IAlso I changed delta to cubeRootVol. I kept all other settings the same as for Smagorinsky, which gave good results. I had run simulation for about 90 flow-through times and after that I started averaging for about 250 flow-through times. Results are not good (velocity is in file on link below). Does anyone have an idea what could be the reason for discrepancy of this model and log law? Relevant settings are on this link

https://www.dropbox.com/s/ct104fg36l...cKEqn.zip?dl=0

Any help is appreciated.

Regards,
Darko

my result with all LES delta models and LES models are similar to your second simulation result.i even tried 3 different versions of openfoam code. but my data in log law are always bigger than the DNS result.can you share your first simulation settings to help me .

Thanks!

Regards,
Xu Bin