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Random vectorial fields representing the local structure of turbulence

Chevillard, Laurent; Robert, Raoul; Vargas, Vincent (2011), Random vectorial fields representing the local structure of turbulence, 13th European Turbulence Conference (ETC13), 2011-09, Varsovie, Pologne

Type
Communication / Conférence
Date
2011
Titre du colloque
13th European Turbulence Conference (ETC13)
Date du colloque
2011-09
Ville du colloque
Varsovie
Pays du colloque
Pologne
Nom de la revue
Journal of Physics: Conference Series
Volume
318
Numéro
4
Éditeur
IOP
Pages
n° 42002
Identifiant publication
Métadonnées
Afficher la notice complète
Auteur(s)
Chevillard, Laurent
Robert, Raoul
Vargas, Vincent
Résumé (EN)
We propose a method to build up a random homogeneous, isotropic and incompressible turbulent velocity field that mimics turbulence in the inertial range. The underlying Gaussian field is given by a modified Biot-Savart law. The long range correlated nature of turbulence is then incorporated heuristically using a non linear transformation inspired by the recent fluid deformation imposed by the Euler equations. The resulting velocity field shows a non vanishing mean energy transfer towards the small scales and realistic alignment properties of vorticity with the eigenframe of the deformation rate.
Mots-clés
velocity field