The Ahmed body is a simplified vehicle geometry that results in flow features representative of those found at the rear of most passenger vehicles. By adjusting the rear slant angle, separation can take place at the sharp corner, on the rear slant panel, or not at all. Accurate prediction of the separation and reattachment of the flow is essential in predicting the correct drag trends. This separation and reattachment is known to be a highly unsteady phenomenon. The objective of this study is to evaluate the ability of a lattice Boltzmann based CFD code to predict the correct drag trends and flow structures for the Ahmed body at varying rear slant angles. Component and total drag values show excellent agreement with the original experiments of Ahmed over a wide range of rear slant angles (5 to 35 degrees). Detailed comparisons of the flow field (velocity profiles on the slant, Cp on the body and wake surveys) at rear slant angles of 25 and 35 degrees are made against the LDV experiments of Leinhart et al.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Lattice Boltzmann Simulations of the Unsteady Flow Behind the Ahmed Body


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Keating, Anthony (Autor:in) / Chen, Hudong (Autor:in) / Shock, Richard (Autor:in)

    Kongress:

    SAE World Congress & Exhibition ; 2008



    Erscheinungsdatum :

    2008-04-14




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Lattice Boltzmann simulations of the unsteady flow behind the Ahmed body

    Keating,A. / Shock,R. / Chen,H. et al. | Kraftfahrwesen | 2008


    2008-01-0740 Lattice Boltzmann Simulations of the Unsteady Flow Behind the Ahmed Body

    Keating, A. / Shock, R. / Chen, H. | British Library Conference Proceedings | 2008


    Unsteady simulations of turbulent flow behind a triangular bluff body

    Madabhushi, Ravi / Choi, Dochul / Barber, Thomas | AIAA | 1997


    Experimental investigation of the unsteady wake of an ahmed body

    Möller, T.J. / Pöttner, J. | Tema Archiv | 2010


    Study on the transient behaviour of the vortex structure behind Ahmed body

    Kohri,I. / Yamanashi,T. / Nasu,T. et al. | Kraftfahrwesen | 2014