- **Main CFD Forum**
(*https://www.cfd-online.com/Forums/main/*)

- - **Comparing spallart-allmaras, k-epsilon, k-omega models**
(*https://www.cfd-online.com/Forums/main/86697-comparing-spallart-allmaras-k-epsilon-k-omega-models.html*)

Comparing spallart-allmaras, k-epsilon, k-omega modelsHi all,
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 |

All times are GMT -4. The time now is 15:55. |