|January 8, 2008, 10:04||
DES ( SA+LES) vs DES ( kwSST+LES) for bluff body
flow separation / vortex shedding.
Does anyone have any experiance with the accuracy of flow separation prediction when using SA for the URANS portion of DES vs. using kw SST for the URANS portion of DES?
My understanding is that the kw SST generally performs well in separation for pure URANS problems.
Does anyone have experience on the separation prediction performance of SA vs kw SST in a DES situation?
I would have guessed that since separation must initiate in the URANS portion of the domain the kw SST model would be preferable?
As it is CFX's DES model which uses kw SST is hopelessly over predicting mu_turb in my low Reynolds number shedding case which is supressing all vortex shedding. I am hence thinking of trying the case with Fluent which gives both options for the URANS portion of the DES model (SA and kw SST).
|Thread||Thread Starter||Forum||Replies||Last Post|
|LES and DES models for wind turbine||mohammad||Main CFD Forum||6||April 30, 2011 22:01|
|LES or DES in wind turbine||mohammad||CFX||2||April 19, 2011 22:16|
|Spanwise Length and Grid Refinement for SAS-SST, DES, and LES||Josh||CFX||5||October 14, 2010 19:47|
|LES simulation of bluff body at Re(d)=1200||arash_nl||FLUENT||0||June 1, 2009 13:16|
|How to use DES well?||Daniel||Main CFD Forum||0||October 26, 2008 06:59|