Rapid alignment of velocity and magnetic field in magnetohydrodynamic turbulence

AMS Citation:
Matthaeus, W. H., A. Pouquet, P. D. Mininni, P. Dmitruk, and B. Breech, 2008: Rapid alignment of velocity and magnetic field in magnetohydrodynamic turbulence. Physical Review Letters, 100, 085003, doi:10.1103/PhysRevLett.100.085003.
Date:2008-02-27
Resource Type:article
Title:Rapid alignment of velocity and magnetic field in magnetohydrodynamic turbulence
Abstract: We show that local directional alignment of the velocity and magnetic field fluctuations occurs rapidly in magnetohydrodynamics for a variety of parameters and is seen both in direct numerical simulations and in solar wind data. The phenomenon is due to an alignment between magnetic field and gradients of either pressure or kinetic energy, and is similar to alignment of velocity and vorticity in Navier-Stokes turbulence. This rapid and robust relaxation process leads to a local weakening of nonlinear terms.
Subject(s):Plasma turbulence, Turbulence simulation and modeling, Magnetohydrodynamics, MHD waves, Plasma waves, Turbulence
Peer Review:Refereed
Copyright Information:Copyright 2008 American Physical Society.
OpenSky citable URL: ark:/85065/d7474c4n
Publisher's Version: 10.1103/PhysRevLett.100.085003
Author(s):
  • W. Matthaeus
  • Annick Pouquet - NCAR/UCAR
  • Pablo Mininni - NCAR/UCAR
  • P. Dmitruk
  • B. Breech
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