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
TypeCommunication / Conférence
Conference title13th European Turbulence Conference (ETC13)
Journal nameJournal of Physics: Conference Series
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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 / Keywordsvelocity field
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