Rotating helical turbulence. Part I: Global evolution and spectral behavior

AMS Citation:
Pouquet, A., and P. D. Mininni, 2010: Rotating helical turbulence. Part I: Global evolution and spectral behavior. Physics of Fluids, 22, doi:10.1063/1.3358466.
Date:2010-03-01
Resource Type:article
Title:Rotating helical turbulence. Part I: Global evolution and spectral behavior
Abstract: We present results from two 1536? direct numerical simulations of rotating turbulence where both energy and helicity are injected into the flow by an external forcing. The dual cascade of energy and helicity toward smaller scales observed in isotropic and homogeneous turbulence is broken in the presence of rotation, with the development of an inverse cascade of energy now coexisting with direct cascades of energy and helicity. In the direct cascade range, the flux of helicity dominates over that of energy at low Rossby number. These cascades have several consequences for the statistics of the flow. The evolution of global quantities and of the energy and helicity spectra is studied, and comparisons with simulations at different Reynolds and Rossby numbers at lower resolution are done to identify scaling laws.
Peer Review:Refereed
Copyright Information:Copyright 2010 American Institute of Physics.
OpenSky citable URL: ark:/85065/d7vm4cqk
Publisher's Version: 10.1063/1.3358466
Author(s):
  • Annick Pouquet - NCAR/UCAR
  • Pablo Mininni - NCAR/UCAR
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