Statistical anisotropy of magnetohydrodynamic turbulence

Wolf-Christian Müller, Dieter Biskamp, and Roland Grappin
Phys. Rev. E 67, 066302 – Published 10 June 2003
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Abstract

Direct numerical simulations of decaying and forced magnetohydrodynamic (MHD) turbulence without and with mean magnetic field are analyzed by higher-order two-point statistics. The turbulence exhibits statistical anisotropy with respect to the direction of the local magnetic field even in the case of global isotropy. A mean magnetic field reduces the parallel-field dynamics while in the perpendicular direction a gradual transition towards two-dimensional MHD turbulence is observed with k3/2 inertial-range scaling of the perpendicular energy spectrum. An intermittency model based on the log-Poisson approach, ζp=p/g2+1(1/g)p/g, is able to describe the observed structure function scalings.

  • Received 14 October 2002

DOI:https://doi.org/10.1103/PhysRevE.67.066302

©2003 American Physical Society

Authors & Affiliations

Wolf-Christian Müller and Dieter Biskamp

  • Centre for Interdisciplinary Plasma Science, Max-Planck-Institut für Plasmaphysik, Euratom Assoziation, 85748 Garching, Germany

Roland Grappin

  • Observatoire de Paris-Meudon, LUTH, 92195 Meudon, France

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Vol. 67, Iss. 6 — June 2003

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