|March 30, 2011, 14:45||
Comparing spallart-allmaras, k-epsilon, k-omega models
Join Date: Mar 2011
Posts: 1Rep Power: 0
I've performed several analyses of flow over a symmetrical wing profile using Star-ccm and used three different turbulent models (RANS: spallart-allamaras, k-epsilon and k-omega models). From the results all 3 give almost identical velocity vector plots but begin to differ for pressure and turbulent viscosity plots.
I was wondering if anyone can explain why the peak pressure at the front of the wing is higher for spallart-allmaras then for both k-epsilon and k-omega models?
The results for turbulent viscosity around the airfoil are also very different between k-epsilon and k-omega models. The turbulent viscosity values for the k-epsilon model change a lot from the surface of the wing to the domain boundary but the k-omega model there is an almost zero value surrounding the wing and then changes value. Wondering if anyone knows why the k-omega values close to the surface are all identical?
Thanks in advance
|Thread||Thread Starter||Forum||Replies||Last Post|
|SimpleFoam k and epsilon bounded||nedved||OpenFOAM Running, Solving & CFD||13||November 4, 2013 15:13|
|Bounding epsilon or bounding omega||Stylianos||OpenFOAM||5||June 9, 2011 00:40|
|SimpleFoam k and epsilon bounded||nedved||OpenFOAM Running, Solving & CFD||1||November 25, 2008 21:21|
|extracting K and Epsilon from Spalart Allmaras||Sundar||Main CFD Forum||4||July 31, 2006 02:02|
|comparing different models and grids||Philipp||Main CFD Forum||4||August 31, 2001 04:14|