Local relaxation and scale-dependent alignment in compressible, magnetized turbulence
physics.plasm-ph, astro-ph.GA, nlin.CD, physics.flu-dyn
Submitted: 2025-04-22
Updated: 2026-09-12
Comments: 6 pages including acknowledgments, 3 main figures; 14 pages total, including Supplemental Material with 2 figures. Accepted in PRL
License: http://creativecommons.org/licenses/by/4.0/
The gist: Driven net- and no-net-flux MHD turbulence simulations up to 10,!368 cubed reveal sign-mixed velocity--magnetic, velocity--vorticity, and magnetic--current aligned patches below the energy
Terminology
Abstract
Driven net- and no-net-flux MHD turbulence simulations up to 10,!368 cubed reveal sign-mixed velocity--magnetic, velocity--vorticity, and magnetic--current aligned patches below the energy equipartition scale. The first two angles scale as λ 1/8 and λ 1/16, while the third angle varies weakly with scale. We develop and test a constant-flux transport model for departures from relaxed states, which predicts both exponents. These findings affect eddy anisotropy, reconnection-mediated turbulence onset, large-scale dynamos, and the nature of magnetized turbulence.
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