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Three-dimensional turbulence without vortex stretching

Published online by Cambridge University Press:  29 March 2021

Wouter J.T. Bos*
Affiliation:
Univ Lyon, École Centrale de Lyon, INSA Lyon, Université Claude Bernard Lyon 1, CNRS, Laboratoire de Mécanique des Fluides et d'Acoustique, UMR 5509, 36 Avenue Guy de Collongue, F-69134 Ecully, France
*
Email address for correspondence: wouter.bos@ec-lyon.fr

Abstract

We consider three-dimensional turbulence from which vortex stretching is removed. The resulting system conserves enstrophy, but does not conserve kinetic energy. Using spectral closure, it is shown that enstrophy is transferred to small scales by a direct cascade. The inviscid truncated system tends to an equipartition of enstrophy over wave vectors. No inverse cascade is observed once the scales larger than the forcing scale are in equipartition.

Information

Type
JFM Papers
Copyright
© The Author(s), 2021. Published by Cambridge University Press

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