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The influence of a mean magnetic field on three-dimensional magnetohydrodynamic turbulence

Published online by Cambridge University Press:  26 April 2006

Sean Oughton
Affiliation:
Department of Mathematical and Computational Sciences, The University, St Andrews, KY16 9SS, UK
Eric R. Priest
Affiliation:
Department of Mathematical and Computational Sciences, The University, St Andrews, KY16 9SS, UK
William H. Matthaeus
Affiliation:
Bartol Research Institute, University of Delaware, Newark, DE 19716, USA

Abstract

Building on results from two-dimensional magnetohydrodynamic (MHD) turbulence (Shebalin, Matthaeus & Montgomery 1983), the development of anisotropic states from initially isotropic ones is investigated numerically for fully three-dimensional incompressible MHD turbulence. It is found that when an external d.c. magnetic field (B0) is imposed on viscous and resistive MHD systems, excitations are preferentially transferred to modes with wavevectors perpendicular to B0). The anisotropy increases with increasing mechanical and magnetic Reynolds numbers, and also with increasing wavenumber. The tendency of B0 to inhibit development of turbulence is also examined.

Type
Research Article
Copyright
© 1994 Cambridge University Press

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