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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
Conference title
13th European Turbulence Conference (ETC13)
Conference date
2011-09
Conference city
Varsovie
Conference country
Pologne
Journal name
Journal of Physics: Conference Series
Volume
318
Number
4
Publisher
IOP
Pages
n° 42002
Publication identifier
Metadata
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Author(s)
Chevillard, Laurent
Robert, Raoul
Vargas, Vincent
Abstract (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.
Subjects / Keywords
velocity field