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Th`ese de Doctorat L'ECOLE CENTRALE DE LYON Ecole Doctorale ...

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CHAPITRE 5. DIFFUSION LAGRANGIENNE D’UN SCALAIRE PASSIF10.8Homo. Eche_GrandHomo. Eche_PetitInhomo. z=8.0 (cm)Inhomo. z=24 (cm)0.6Ruu0.40.200 0.2 0.4 0.6 0.8t(s)Figure 5.41: Corrélation <strong>de</strong> vitesse Lagrangienne dans une turbulence inhomogène. Zonequasi-homogène. Re λ = 65 .10.8Homo. Gran<strong>de</strong> EchelleHomo. Petite Echelle.Inhomo. z=16(cm)Inhomo. z=17(cm)Inhomo. z=18(cm)Inhomo. z=19(cm)Ruu (Lagrange)0.60.40.200 0.1 0.2 0.3 0.4 0.5t(s)Figure 5.42: Corrélation <strong>de</strong> vitesse Lagrangienne dans une turbulence inhomogène. Zone<strong>de</strong> couche <strong>de</strong> mélange. Re λ = 65 .167

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