2006/11/21 by Tarek A. Yousef, T. A. YOUSEF, Francois Rincon +3 · 1 citation
Engineering · Physics and Astronomy · #Fluid Dynamics and Turbulent Flows #Magnetic confinement fusion research #Solar and Space Plasma Dynamics #astro-ph #physics.flu-dyn
paper · pdf · doi:10.1017/s0022112006004186
published as J.FluidMech.575:111-120,2005 · 10 pages, 6 figures. Accepted for publication in Journal of Fluid Mechanics
arxiv created 2006/11/21 · openalex publication_date 2007/03/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
This paper examines the consistency of the exact scaling laws for isotropic magnetohydrodynamic (MHD) turbulence in numerical simulations with large magnetic Prandtl numbers P m and with P m = 1. The exact laws are used to elucidate the structure of the magnetic and velocity fields. Despite the linear scaling of certain third-order correlation functions, the situation is not analogous to the case of Kolmogorov turbulence. The magnetic field is adequately described by a model of a stripy (folded) field with direction reversals at the resistive scale. At currently available resolutions, the cascade of kinetic energy is short-circuited by the direct exchange of energy between the forcing-scale motions and the stripy magnetic fields. This non-local interaction is the defining feature of isotropic MHD turbulence.