Generation of non-Gaussian statistics and coherent structures in ideal magnetohydrodynamics

Wan, M.; Oughton, S.; Servidio, S.; Matthaeus, W. H.
August 2009
Physics of Plasmas;Aug2009, Vol. 16 Issue 8, p080703
Academic Journal
Spectral method simulations of ideal magnetohydrodynamics are used to investigate production of coherent small scale structures, a feature of fluid models that is usually associated with inertial range signatures of nonuniform dissipation, and the associated emergence of non-Gaussian statistics. The near-identical growth of non-Gaussianity in ideal and nonideal cases suggests that generation of coherent structures and breaking of self-similarity are essentially ideal processes. This has important implications for understanding the origin of intermittency in turbulence.


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