Depression of Nonlinearity in Decaying Isotropic MHD Turbulence

Details Depression of Nonlinearity in Decaying Isotropic MHD Turbulence Depression of Nonlinearity in Decaying Isotropic MHD Turbulence

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phrvl.100i5005s&link_type=abstract

Physical Review Letters, vol. 100, Issue 9, id. 095005

Statistics

26

Magnetohydrodynamics, Magnetohydrodynamic Waves, Plasma Turbulence, Mhd Waves, Plasma Waves, Turbulence

Scientific paper

Spectral method simulations show that undriven magnetohydrodynamic turbulence spontaneously generates coherent spatial correlations of several types, associated with local Beltrami fields, directional alignment of velocity and magnetic fields, and antialignment of magnetic and fluid acceleration components. These correlations suppress nonlinearity to levels lower than what is obtained from Gaussian fields, and occur in spatial patches. We suggest that this rapid relaxation leads to non-Gaussian statistics and spatial intermittency.

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