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A CFD Approach via Large Eddy Simulation to the Flow Field with Complex Geometrical Configurations: A Study Case of Vehicle Underbody Flows
Technical Paper
2009-01-0332
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
CFD is becoming an inevitable modern engineering tool in the vehicle aerodynamics. A LES based CFD approach is proposed for analysis for flows with complex geometrical configurations to which detailed experiments, high grid-density LES or DNS cannot be applicable. How CFD results should be evaluated for cases in which the related experiments are not available. The procedure proposed consists of four stages, i.e., inspections of solutions with coarse and fine meshes, reconfirmation of energy spectrum, references to the similar experiments, explanations of results obtained. The procedures are applied to the underbody flows with a semi-complex underbody configuration.
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Kitoh, K., Oshima, N., Yamamoto, M., and Sebben, S., "A CFD Approach via Large Eddy Simulation to the Flow Field with Complex Geometrical Configurations: A Study Case of Vehicle Underbody Flows," SAE Technical Paper 2009-01-0332, 2009, https://doi.org/10.4271/2009-01-0332.Also In
References
- Kitoh, K. Kuthada, T. Oshima, N. Sebben, S. Yamamoto, M. Aerodynamic design of the vehicle underbody: Reviews and several new computations FISITA Paper F2006M046 2006
- Elofsson, P. Banister, M. Drag reduction mechanism due to moving ground and wheel rotation in passenger cars SAE Paper 2002-01-0531 2002
- Aronson, D. Brahim, S.B. Perzon, S. On the underbody flow of a simplified estate SAE Paper 2000-01-0485 2000
- Perzon, S. Davidson, L. On transient modeling of the flow around vehicles using the Reynolds equation ACFD Beijing 720 729 2000
- Smagorinsky, J. General circulation experiments with the primitive equations Part 1 The basic experiment, Monthly Weather Review 91 No. 3 99 164 1963
- Inst. of Industrial Science, Univ. of Tokyo Revolutionary simulation software FrontFlow/red http://www.rss21.iis.u-tokyo.ac.jp/
- Launder, B.E. Spalding, D.B. The numerical computation of turbulent flow Computer Methods in Applied Mechanics and Engineering 3 260 289 1974
- Kitoh, K. Tsubokura, M. Nakashima, T. Oshima, N. Yamamoto Zhang, H. M. Onishi, K. Kobayashi, T. Large-scale LES on the flow around a vehicle body –Evaluation on grid dependency- Trans. of JSAE 38 No. 6 297 303 2007
- Tsubokura, M. Kitoh, K. Oshima, N. Zhang, H. Onishi, K. Tominaga, T. Kobayashi, T. High performance LES on Earth Simulator A challenge for vehicle aerodynamics, FISITA 2006 Trans., Paper F2006M111T 2007
- Tsubokura, M. Nakashima, Oshima, N. Kitoh, K. Zhang, H. Hori, K. Kobayashi, T. Unstructured large eddy simulation of flows around automobiles using high performance computing technique A shift from steady to unsteady aerodynamics, ETMM-7, Paper N185 2008
- Ramnefors, M. Bensryd, R. Holmberg, E. Perzon, S. Accuracy of drag prediction on cars using CFD –Effect of grid refinement and turbulence models SAE Paper 960681 1996
- Morinishi, Y. Kobayashi, T. Large eddy simulation of backward facing step flow Engineering Turbulence Modeling and Experiments 1990
- AIAA Guide for the verification and validation of computational fluid dynamics simulations 1998
- Stern, F. Wilson, R.V. Coleman, H.W. Pater-son, E.G. Comprehensive approach to verification and vali-dation of CFD simulations –Part 1 Methodology and procedures, ASME J. Fluids Engineering 123 793 802 2001
- Kitoh, K. Chatani, S. Oshima, N. Nakashima, T. Sebben, S. Large eddy simulation on the underbody flows of the vehicle with semi-complex underbody configuration SAE Paper 2007-01-0103 2007
- Buchheim, R. Leie, B. Lueckoff, H.-J. Der neue Audi 100 –Ein Beispiel fuer konsequente aerodyna-mische Personenwagen-Entwicklung- ATZ 85 419 425 1983
- Walker, T. 2006