DNS et LES de turbulence de paroi soumis un gradient de pression
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2009
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34
pages
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2009
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Intro Numerical code Results Conclusion DNS et LES de turbulence de paroi soumis a un gradient de pression J.-P. Laval (1), M. Marquillie (1) (1) Laboratoire de Mecanique de Lille (LML), CNRS Blv Paul Langevin 59655 Vileneuve d'Ascq, FRANCE J.-P. Laval (1), M. Marquillie (1) Journee Scinetifique ONERA, 9 Octobre 2009, Chatillon
Voir
- investigating models
- projection method
- curved wall ?
- computation domain
- wall turbulence
- nd order
- models near
- incompressible navier-stokes equations
- nd order backward
DNSetLESdeturbulencedeparoisoumis`aun gradient de pression
Jean-Philippe.Laval@univ-lille1.fr
J -P Laval(1), M. Marquillie(1) . .
NERA,9Octobre200
(1)SC,RNLab´Mednacetaroerioe(llL)LMueiqLide Blv Paul Langevin 59655 Vileneuve d’Ascq, FRANCE
→Experiments on flat wall (Poland) and curved wall (Surrey & LML) →DNS of APG boundary layer on flat wall (Madrid) →DNS of APG channel flow: both flat & curved wall⇒DEISA (Performed by LML in collaboration with TU Munich (Germany), University of Rome (Italy), Chalmers University (Sueden), University of Surrey (UK))
Objectives →Generating and analysing new data on near wall turbulence, →Extracting physical understanding from these data, →Putting more physics in the near wall RANS models, →Developing better LES models near the wall, →Investigating models based on Low Order Dynamical Systems. WALLTURB Databases on Adverse Pressure Gradient Flows
WALLTURB: A European Synergy for Assesment of Wall Turbulence (STREP FP6 2005-2009,e1.frl)illniv-rb.ullut//awtt:ph
nolli-PJ.av.LqraMlliu1(la.M,)
•Spatial discretisation : →4thorder finite differences for Laplacian (streamwise). →Collocation-Chebyshev (normal). →Fourier (spanwise) •Temporal discretisation : →2nd order backward Euler. →2nd order Adams-Bashforth •Projection method for incompressibility.
∂~u¯ ~ ~¯1¯Δ~ ¯ u, ∂¯t+ (~u¯.r¯)~¯u=−rp¯ +Re ~ ¯~ r.u¯ = 0.
on
•Incompressible Navier-Stokes equations :
