S. Ghosh

TL;DR: In this article, the spectral and variance anisotropies are investigated in both compressible and incompressible magnetohydrodynamics (MHD) equations, and the spectral anisotropy is consistent with the model of Shebalin et al.

TL;DR: In this paper, a two-dimensional incompressible MHD spectral code is used to show that large-scale shear can nonlinearly produce a cascade to smaller scale fluctuations even when the linear Kelvin-Helmholtz mode is stable, and that a roughly power law inertial range is established by this process.

TL;DR: In this article, the authors used a compressible Hall MHD code with a constant magnetic field and a polytropic equation of state Artificial dissipation in the form of a bi-Laplacian operator is used to suppress numerical instabilities, allowing a clear separation of the dissipative scales from the ion cyclotron scales.

TL;DR: The results of previous investigations of low Mach number MHD density fluctuations and associated dynamical structure of nearly compressible polytropic MHD are reviewed in this article, where the recipe for computing pseudo-ound density fluctuations is generalized to give rise to formulas expressing the density spectrum in terms of the incompressible field variables in homogeneous MHD turbulence with arbitrary rotational symmetry and with arbitrary magnetic and cross helicity spectra.

TL;DR: In this paper, anisotropy of low frequency plasma turbulence scales linearly with the ratio of fluctuating to total magnetic field strength for a useful range of parameters, for incompressible, weakly compressible, and driven magnetohydrodynamic turbulence.