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 inertial-range scaling of the perpendicular energy spectrum. An intermittency model based on the log-Poisson approach, 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