Numerical Investigations of Magnetohydrodynamic Turbulence

Details Numerical Investigations of Magnetohydrodynamic Turbulence Numerical Investigations of Magnetohydrodynamic Turbulence

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh11b..01m&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SH11B-01

Physics

Plasma Physics

4415 Cascades, 4490 Turbulence (3379, 4568, 7863), 7800 Space Plasma Physics, 7827 Kinetic And Mhd Theory, 7839 Nonlinear Phenomena (4400, 6944)

Scientific paper

Incompressible magnetohydrodynamic turbulence studied by large-scale direct numerical simulations has revealed a number of new interesting facets. The Goldreich-Sridhar phenomenology partly breaks down in turbulence subject to a strong mean magnetic field. This leads to a measureable anisotropy of two-point statistics. The nonlinear dynamics of kinetic (E^K) and magnetic energy (E^M) is the result of a dynamical equilibrium of Alfvén effect and a small-sale dynamo leading to a scaling relation between total and residual energy: (E^M-E^K)~ k(E^K+E^M)2. The probability density functions of cascading quantities are found to exhibit mono-scaling.

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