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http://dx.doi.org/10.6112/kscfe.2016.21.1.030

COARSE GRID LARGE-EDDY SIMULATION OF FLOW OVER A HEAVY VEHICLE  

Lee, S. (Flow Physics and Engineering Laboratory, Dept. of Mechanical Engineering, Pohang University of Science and Technology)
Kim, M. (Flow Physics and Engineering Laboratory, Dept. of Mechanical Engineering, Pohang University of Science and Technology)
You, D. (Flow Physics and Engineering Laboratory, Dept. of Mechanical Engineering, Pohang University of Science and Technology)
Kim, J.J. (Advanced Fluid Engineering Research Center, Dept. of Mechanical Engineering, Pohang University of Science and Technology)
Lee, S.J. (Advanced Fluid Engineering Research Center, Dept. of Mechanical Engineering, Pohang University of Science and Technology)
Publication Information
Journal of computational fluids engineering / v.21, no.1, 2016 , pp. 30-35 More about this Journal
Abstract
In order to investigate effects of grid resolution on large-eddy simulation of flow over a heavy vehicle, large-eddy simulations over the vehicle with coarse grid and fine grid are conducted. In addition, comparison of drag coefficients with the experimental data obtained by a wind tunnel experiment is conducted. Both of the drag coefficients of coarse grid and fine grid large-eddy simulation show good agreement with the experimental data. Flow fields obtained by the coarse and the fine grid large-eddy simulation are compared in the vehicle frontal-face region, the vehicle rear wheel region, and the vehicle base region. Coarse grid large-eddy simulation shows good agreement with the fine grid large-eddy simulation in the vehicle front face region and the vehicle rear wheel region, since the flow over the present vehicle is dominated by flow separation which is geometrically pre-determined, not by the skin friction which is known to be sensitive to grid resolution.
Keywords
Large-eddy simulation; Separated Flow; Grid resolution;
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