DNS et LES de turbulence de paroi soumis un gradient de pression

Jean Philippe Laval

Description

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

• investigating models


• projection method


• curved wall ?


• computation domain


• wall turbulence


• nd order


• models near


• incompressible navier-stokes equations


• nd order backward

Sujets

• Laboratoire de mécanique de Lille
• Langevin
• Chalmers University of Technology

Informations

• Publié par: pefav
• Publié le: 01 octobre 2009
• Nombre de lectures: 24
• Langue: Français
• Poids de l'ouvrage: 5 Mo

Extrait

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[e-mail]

J -P Laval (1) , M. Marquillie (1) . .

NERA,9Octobre200

(1) SC,RNLab´Mednacetaroerioe(llL)LMueiqLide Blv Paul Langevin 59655 Vileneuve d’Ascq, FRANCE

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→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

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•Spatial discretisation : →4 th order 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 :