An hybrid unstructured finite-volume algorithm for road vehicle flow computations with ground effects Online publication date: Wed, 08-Oct-2003
by Y.J. Zhang, Z.H. Lv, J.M. Xie, S.R. Tu
International Journal of Vehicle Design (IJVD), Vol. 33, No. 4, 2003
Abstract: Grid generation is one of the main difficulties for road vehicle flow computations, and ground proximity effects are unavoidable part of automobile aerodynamics. A hybrid unstructured Navier-Stokes method is presented for the simulation of the incompressible turbulent flows around vehicle bodies. And a ground effect model is given out to investigate the ground effects numerically. RNG-κ-E model is used for turbulence closure. The hybrid grid system is composed of a structured grid for the outer large region of the computational domain, a structured or semi structured grid for the near-wall viscous region, and an unstructured grid for the remainder of the computational domain. The incompressible Navier-Stokes equations are solved on the hybrid grid by a cell-vertex, central differencing finite volume method. The effects of the ground on the body flow distributions have been investigated using a simple car model configuration.
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