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Incompressible Flow Computations Around Vehicle Bodies Using Unstructured Hybrid Grids
Technical Paper
2002-01-0598
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
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].
Authors
Citation
Yangjun, Z., Zhenhua, L., Jinming, X., and Shangrong, T., "Incompressible Flow Computations Around Vehicle Bodies Using Unstructured Hybrid Grids," SAE Technical Paper 2002-01-0598, 2002, https://doi.org/10.4271/2002-01-0598.Also In
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