A hybrid unstructured Navier-Stokes method is presented for the simulation of the incompressible turbulent flows around vehicle bodies. The hybrid grid system is composed of a structured or semistructured grid for the near-wall viscous region, and an unstructured grid for the remainder of the computational domain. By using prismatic cells, the number of cells in the boundary-layer region becomes approximately one-third of the tetrahedral grid. And the laminated grid rather than the tetrahedral grid is more suitable in the boundary-layer region for accurately computing the viscous terms. The incompressible Navier-Stokes equations are solved on the hybrid grid by a cell-vertex, central differencing finite volume method. The numerical accuracy of the present method is discussed by comparing with the experimental data for the cases of flows around a car model at different ground clearances. It is demonstrated that the present hybrid method is efficient to predict the incompressible flow fields over the vehicle bodies[1].


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    Titel :

    Incompressible Flow Computations Around Vehicle Bodies Using Unstructured Hybrid Grids


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Zhenhua, Lv (Autor:in) / Shangrong, Tu (Autor:in) / Jinming, Xie (Autor:in) / Yangjun, Zhang (Autor:in)

    Kongress:

    SAE 2002 World Congress & Exhibition ; 2002



    Erscheinungsdatum :

    2002-03-04




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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