Analysis of the Active and Passive Drag Reduction Strategies Behind a Square Back Ground Vehicle

  • Charles-Henri Bruneau
  • Emmanuel Creusé
  • Delphine Depeyras
  • Patrick Gilliéron
  • Iraj MortazaviEmail author
Conference paper
Part of the Lecture Notes in Applied and Computational Mechanics book series (LNACM, volume 79)


A square back Ahmed body is used to mimic a heavy vehicle, bus or truck, in order to derive control processes that yield a significant drag reduction. The first step is to analyse carefully the structures in the flow that have a strong impact on the drag forces. Then, active and passive controls using blowing jets or porous medium layers are presented and discussed. The results are analyzed showing the direct impact of the control on the flow behaviour.


Drag Force Drag Coefficient Porous Layer Drag Reduction Strouhal Number 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The simulations were run on PLAFRIM platform supported by IMB University of Bordeaux and INRIA Bordeaux - Sud Ouest.


  1. 1.
    Ahmed, S.R., Ramm, G., Faltin, G.: Some salient features of the time-averaged ground vehicle wake. SAE-Paper 840300 (1984)Google Scholar
  2. 2.
    Angot, Ph., Bruneau, Ch.-H., Fabrie, P.: A penalization method to take into account obstacles in incompressible viscous flows. Numer. Math. 81 (1999)Google Scholar
  3. 3.
    Bruneau, Ch.-H.: Boundary conditions on artificial frontiers for incompressible and compressible Navier-Stokes equations. Math. Model. Num. Anal. 34(2) (2000)Google Scholar
  4. 4.
    Bruneau, Ch.-H., Creuse, E., Depeyras, D., Gilliéron, P., Mortazavi, I.: Coupling active and passive techniques to control the flow past the square back Ahmed body. Comput. Fluids 39 (2010)Google Scholar
  5. 5.
    Bruneau, Ch.-H., Creuse, E., Depeyras, D., Gilliéron, P., Mortazavi, I.: Analysis of the drag reduction using vorex kinematics behind a bluff-body. ASME Paper FEDSM-ICNMM2010-30716 (2010)Google Scholar
  6. 6.
    Bruneau, Ch.-H., Mortazavi, I.: Passive control of bluff body flows using porous media. Int. J. Num. Methods Fluids 46 (2004)Google Scholar
  7. 7.
    Bruneau, Ch.-H., Mortazavi, I.: Numerical modelling and passive flow control using porous media. Comput. Fluids 37, \(n^0\) 5 (2008)Google Scholar
  8. 8.
    Bruneau, Ch.-H., Mortazavi, I., Gilliéron, P.: Passive control around the two-dimensional square back Ahmed body using porous devices. J. Fluids Eng. 130 (2008)Google Scholar
  9. 9.
    Bruneau, Ch.-H., Saad M.: The 2D lid-driven cavity problem revisited. Comput. Fluids 35, \(n^0\) 3 (2006)Google Scholar
  10. 10.
    Brunn, A., Wassen, E., Sperber, D., Nitsche, W., Thiele, F.: Active Drag Control for a Generic Car Model. In: King (ed.) Active Flow Control, Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol. 95, pp. 247–259 (2007)Google Scholar
  11. 11.
    Carbou, G.: Brinkmann model and double penalization method for the flow around a porous thin layer. J. Math. Fluid Mech. 8 (2006)Google Scholar
  12. 12.
    Gilliéron, P., Chometon, P.: Modelling of stationary three-dimensional separated air flows around an Ahmed reference model. ESAIM 7 (1999)Google Scholar
  13. 13.
    Krajnović, S., Davidson, L.: Numerical study of the flow around the bus-shaped body. ASME J. Fluids Eng. 125 (2003)Google Scholar
  14. 14.
    Martins, L.F., Ghoniem, A.F.: Simulation of the non-reacting flow in a bluff-body burner: effect of the diameter ratio. J. Fluids Eng. 115 (1993)Google Scholar
  15. 15.
    Mortazavi, I., Giovannini, A.: The simulation of vortex dynamics downstream of a plate separator using a vortex-finite element method. Int. J. Fluid Dyn. 5 (2001)Google Scholar
  16. 16.
    Pastoor, M., Henning, L., Noack, B.R., King, R., Tadmor, G.: Feedback shear layer control for bluff body drag reduction. J. Fluid Mech. 608 (1984)Google Scholar
  17. 17.
    Rouméas, M.: Contribution à l’analyse et au contrôle des sillages de corps épais par aspiration ou soufflage continu, Ph.D. thesis Toulouse, France (2006)Google Scholar
  18. 18.
    Sipp, D., Coppens, F., Jacquin, L.: Theoretical and numerical analysis of wake vortices. ESAIM Proc. 7 (1999)Google Scholar

Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Charles-Henri Bruneau
    • 1
    • 2
  • Emmanuel Creusé
    • 3
    • 4
  • Delphine Depeyras
    • 1
    • 2
  • Patrick Gilliéron
    • 5
  • Iraj Mortazavi
    • 1
    • 2
    Email author
  1. 1.IMB, UMR 5251Univ. BordeauxTalenceFrance
  2. 2.CNRS, IMB, UMR 5251. INRIA, Team MC2TalenceFrance
  3. 3.LPP (UMR CNRS 8524)Université Lille 1Villeneuve-d’AscqFrance
  4. 4.Team SIMPAF INRIA Lille Nord EuropeVilleneuve-d’AscqFrance
  5. 5.Renault, Direction de La RechercheGuyancourtFrance

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