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COARSE GRID LARGE-EDDY SIMULATION OF FLOW OVER A HEAVY VEHICLE
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 Title & Authors
COARSE GRID LARGE-EDDY SIMULATION OF FLOW OVER A HEAVY VEHICLE
Lee, S.; Kim, M.; You, D.; Kim, J.J.; Lee, S.J.;
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 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;
 Language
Korean
 Cited by
 References
1.
2006, Wood, R.M., "A discussion of a heavy truck advanced aerodynamic trailer system," Int. Symp. Heavy Veh. Weights Dimens., 9th, University Park, PA.

2.
1985, Ahmed, S.R., Gawthorpe, R.G. and Mackrodt, P.A., "Aerodynamics of road and rail vehicles," Veh. Syst. Dyn., Vol.14, pp.319-392. crossref(new window)

3.
1981, Allan, J.W., "Aerodynamic drag and pressure measurements on a simplified tractor-trailer model," J. Wind Eng. Ind. Aerodyn., Vol.9, No.1, pp.125-136. crossref(new window)

4.
1993, Hucho, W.H. and Sovran, G., "Aerodynamics of road vehicles," Annu. Rev. Fluid Mech., Vol.25, No.1, pp.485-537. crossref(new window)

5.
2014, Choi, H.C., Lee, J.K. and Park, H.M., "Aerodynamics of heavy vehicles," Ann. Rev. Fluid Mech., Vol.46, pp.441-468. crossref(new window)

6.
2005, Yang, Z. and Bahram K., "CFD simulations for flow over pickup trucks," SAE Technical Paper., No.2005-01-0547.

7.
2003, Bettle, J., Holloway, A.G.L. and Venart, J.E.S., "A computational study of the aerodynamic forces acting on a tractor-trailer vehicle on a bridge in cross-wind," Journal of Wind Engineering and Industrial Aerodynamics., Vol.91 No.5, pp.573-592. crossref(new window)

8.
2016, Krajnovi, S., "What can les do in vehicle aerodynamics?," The Aerodynamics of Heavy Vehicles III., Vol.79, pp.311-326. crossref(new window)

9.
2009, You, D. and Moin, P., "A dynamic global-coefficient subgrid-scale model for large-eddy simulation of turbulent scalar transport in complex geometries," Physics of Fluids., Vol.21, No.4, p.045109. crossref(new window)