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kOmegaSSTSASDear OpenFoam 1.6 users and experts,
I'm trying to use the LES turbulence model "kOmegaSSTSAS". I noticed some differences between the implemented version and the reference**. The main difference is the SAS source term in the omega equation: in the reference there is a (L/Lvk2)^2 (squared) instead of a simple L/Lvk2 (the coefficients of this term are also different). I'm doing a master thesis in CFD using this model, so I'm aware of how the model works. In the study of this model I discovered that the first version by Menter has a simple L/Lvk2 and later this term has been squared. Underlining that the other coefficients of the implemented model are the same of the reference (except those of the SAS source term), I have two questions: 1) Is the difference I noticed a bug? 2) Is the implemented kOmegaSSTSAS an old version of the model and so it needs to be updated? Any help would be greatly appreciated! **Reference: DESider A European Effort on Hybrid RANS-LES Modelling: Results of the European-Union Funded Project, 2004 - 2007 (Notes on Numerical Fluid Mechanics and Multidisciplinary Design). Chapter 8 Formulation of the Scale-Adaptive Simulation (SAS) Model during the DESIDER Project. F. R. Menter and Y. Egorov. |

Hi
There are two version of SST based SAS model 2007 version : Egorov, Y.,and Menter, F. , “Development and Application of SST-SAS Turbulence Model in the DESIDER Project”, Second Symposium on Hybrid RANS-LES Methods, Corfu, Greece, 2007 2005 version : Menter, F.R. and Egorov, Y., "A Scale-Adaptive Simulation Model using Two-Equation Models", AIAA paper 2005-1095, Reno/NV, 2005. here maybe the old version. and Fsas=1.25,this parameter is not in 2007 one . you may modified this to new the one. wish helps! wayne |

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