Accurate turbulence modeling remains a critical problem in the prediction capability of computational fluid dynamics. In this paper, a new one-equation eddy-viscosity model is derived from k - ω closure. The ω equation used in this derivation includes a cross-diffusion term that allows the new model to switch between the model properties exhibited by the two-equation k - ω or k - ε turbulence models. In addition, the damping function used in conjunction with the proposed one-equation model has not been studied before in the literature. The new model is used to simulate several benchmark canonical flows involving both the free shear layer and wall-bounded turbulent flows with small separation regions. The open-source software OpenFOAM is used for the flowfield calculations. It is shown that the new model improves the accuracy of flow simulations compared to the widely used one-equation Spalart–Allmaras model and is competitive with the shear-stress-transport k - ω model.


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    Titel :

    Low-Reynolds-Number One-Equation Turbulence Model Based on k - ω Closure


    Beteiligte:

    Erschienen in:

    AIAA Journal ; 53 , 8 ; 2216-2227


    Erscheinungsdatum :

    2015-04-20


    Format / Umfang :

    12 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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