Corrélations de vitesse lagrangienne et échelle intégrale temporelle en simulation des grandes échellesLagrangian velocity correlations and timescales by a large-eddy simulation |
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Authors: | Guoxin Wei Ivana Vinkovic Liang Shao Serge Simoëns |
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Institution: | LMFA, UMR CNRS 5509, Université de Lyon I, École Centrale de Lyon, 69131 Ecully Cedex, France |
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Abstract: | Velocity correlations and Lagrangian timescales are studied numerically by means of a direct numerical simulation (DNS) and a large-eddy simulation (LES) coupled with a subgrid Lagrangian stochastic model, in the case of a homogeneous and isotropic turbulence. A Langevin model is used to determine the subgrid component of the velocity of fluid particles. Numerical results of Lagrangian velocity correlations and timescales are presented. These quantities play an important role in turbulent mixing and scalar dispersion. To cite this article: G. Wei et al., C. R. Mecanique 334 (2006). |
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Keywords: | Mécanique des fluides Corrélation lagrangienne Échelle intégrale Modèle stochastique LES Fluid mechanics Lagrangian correlation Integral timescales Stochastic model LES |
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