In decaying sub-sonic MHD turbulence simulations, the amplitude and plasma beta, not the injection wave type, set the turbulent density fluctuation level, while curvature and mirror statistics change dramatically with injection, amplitude, and beta.
A weak turbulence theory for incompressible MHD
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abstract
We derive a weak turbulence formalism for incompressible MHD. Three-wave interactions lead to a system of kinetic equations for the spectral densities of energy and helicity. We find energy spectra solution of the kinetic equations. The constants of the spectra are computed exactly and found to depend on the amount of correlation between the velocity and the magnetic field. Comparison with several numerical simulations and models is also made.
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physics.plasm-ph 1years
2026 1verdicts
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Sub-sonic compressible magnetohydrodynamic turbulence I. Alfv\'enic and fast-magnetosonic injection, amplitude dependence, and compressibility effects
In decaying sub-sonic MHD turbulence simulations, the amplitude and plasma beta, not the injection wave type, set the turbulent density fluctuation level, while curvature and mirror statistics change dramatically with injection, amplitude, and beta.