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Statistics of the velocity gradient tensor perceived by a set of four tracer particles in homogeneous rotating turbulence

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The dynamics and structure of rotating homogeneous turbulence is investigated through the statistical properties of the “perceived” velocity gradient tensor, defined by interpolation from the locations and velocities of a set of four particles. Results from direct numerical simulations of forced homogeneous rotating turbulence at different Rossby numbers are presented. We thus provide a multi-scale analysis of the dynamics of rotating turbulence, and of some of its important features.

Author(s):

Aurore Naso    
Laboratoire de Mécanique des Fluides et d'Acoustique - CNRS
France

Fabien S. Godeferd    
Laboratoire de Mécanique des Fluides et d'Acoustique - CNRS
France