IMPLEMENTATION AND VERIFICATION OF k-kL TURBULENCE MODELErdem Dikbas and Ozgur Ugras Baran In this study, we present the first results of a new turbulence model implementation in our compressible finite volume CFD solver. The k-kL turbulence model is based on the ideas of Rotta s two-equation model. Various research groups progressively develop the model, and it is maturing rapidly. According to the results presented by others, the k-kL turbulence model provides superior results compared to other two-equation turbulence models. The improved solutions are observed especially in flows with high adverse pressure gradients, the blunt body wakes and jet interactions. We have implemented the k-kL model in our solver and we are testing it rigorously. This paper presents our results on standard turbulence test cases, which are subsonic flat plate and subsonic wall-mounted bump. The results compare well with the reference study that are previously presented and published by model developers. The k-kL model prevents excessive production of turbulence and dissipation; hence it preserves vortices significantly better than the other RANS models. Therefore, the implemented model is also tested with a transonic fin trailing vortex case and considerably better results are achieved compared to the SST turbulence model. |