Anisotropic Energy Transfer and Conversion in Magnetized Compressible Turbulence

We present a spatial filtering (or coarse graining) analysis on 3D magnetized magnetohydrodynamic (MHD) turbulence simulations. The anisotropic filtering allows us to analyze the energy flows perpendicular and parallel to the global mean magnetic field separately. The filtered compressible MHD formulas show transfer of kinetic and magnetic energies from large to small scales, as well as energy conversion between kinetic, magnetic, and thermal energy. We find notable anisotropy for the energy conversion between kinetic and magnetic energy when both velocity and magnetic fluctuations are injected at large scales. While the compressibility of driving force affects the partition of different channels of energy transfer and conversion, the global energy flow remains unchanged qualitatively.