Friday, April 6, 2012

1111.5329 (Andrey Beresnyak)

Basic Properties of MHD Turbulence in the Inertial Range    [PDF]

Andrey Beresnyak
We revisit the issue of spectral slope of MHD turbulence in the inertial range and argue that numerics favor Goldreich-Sridhar -5/3 slope rather than -3/2 slope. We also did precision measurements of anisotropy of MHD turbulence and determined the anisotropy constant C_A=0.34 of Alfvenic turbulence. Together with previously measured Kolmogorov constant C_K=4.2, or 3.3 for purely Alfvenic case, it constitutes a full description of MHD cascade in terms of spectral quantities, which is of high practical value for astrophysics.
View original: http://arxiv.org/abs/1111.5329

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