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Experiments in Fluids
Published in: Experiments in Fluids 1/2006

01-01-2006 | Research Article

Scalar dispersion in the near wake of a simplified model car

Authors: Kévin Gosse, Béatrice Patte-Rouland, Michel Gonzalez, Pierre Paranthoën

Published in: Experiments in Fluids | Issue 1/2006

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Abstract

Experimental results on tracer gas diffusion within the near wake of a simplified model car (Ahmed model with a rear slant angle of 25°) are presented. Pollutant emission is simulated using heated air injected through a small pipe at one side of the model base. Fine cold wire thermometry is used to measure instantaneous temperature excess in the near wake. Characteristics of the temperature field over the Reynolds number range (1.3×104<Re L<7×104) show strong differences as a result of transition in the wake at a critical Reynolds number Re Lc=2.7×104.
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Literature
Ahmed SR, Ramm G, Faltin GR (1984) Some salient features of the time-averaged ground vehicle wake. SAE paper 840300
Beaudoin J-F, Cadot O, Aider JL, Gosse K, Paranthoën P, Hamelin B, Tissier M, Allano D, Mutabazi I, Gonzalez M, Wesfreid JE (2004) Cavitation as a complementary tool for automotive aerodynamics. Exp Fluids 37(5):763–768CrossRef
Chan TL, Dong G, Cheung CS, Leung CW, Wong CP, Hung WT (2001) Monte Carlo simulation of nitrogen oxides dispersion from a vehicular exhaust plume and its sensitivity studies. Atmos Environ 35:6117–6127CrossRef
Eskridge RE, Rao ST (1986) Turbulent diffusion behind vehicles: experimentally determined turbulence mixing parameters. Atmos Environ 13(5):850–860
Gilliéron P, Chometon F (1999) Modelling of stationary 3D separated air flows around an Ahmed reference model. In: Proceedings of the third international workshop on vortex, ESAIM, 7, pp 173–182
Howard RJA, Pourquie M (2002) Large eddy simulation of an Ahmed reference model. J Turbulence 3(012):1–18CrossRef
Kim DH, Gautam M, Gera D (2001) On the prediction of concentration variations in a dispersing heavy-duty truck exhaust plume using k–ε turbulent closure. Atmos Environ 35(31):5267–5275CrossRef
Lienhart H, Stoots C, Becker S (2000) Flow and turbulence structures in the wake of a simplified car model (Ahmed model). In: Proceedings of the DGLR Fach. Symp. der AG STAB, Stuttgart University, 15–17 November, 2000
Morel T (1978) Aerodynamic drag of bluff body shapes of characteristic hatchback car. Proc. SAE paper 780 267
Richards KA, Wright NG, Baker CJ, Baxendale AJ (2000) Computational modelling of pollution dispersion in the near wake of a vehicle. In: International conference on aerodynamics, proceedings of the MIRA
Sharma P, Khare M (2001) Modelling of vehicular exhausts—a review. Transport Res D 6:179–198CrossRef
Thompson RS, Eskridge RE (1987) Turbulent diffusion behind vehicles: experimentally determined influence of vortex pair in vehicle wake. Atmos Environ 21:2091–2097CrossRef
Metadata
Title
Scalar dispersion in the near wake of a simplified model car
Authors
Kévin Gosse
Béatrice Patte-Rouland
Michel Gonzalez
Pierre Paranthoën
Publication date
01-01-2006
Publisher
Springer-Verlag
Published in
Experiments in Fluids / Issue 1/2006
Print ISSN: 0723-4864
Electronic ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-005-0055-z

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