Complexity Induced Anisotropic Bimodal Intermittent Turbulence in Space Plasmas

Details Complexity Induced Anisotropic Bimodal Intermittent Turbulence in Space Plasmas Complexity Induced Anisotropic Bimodal Intermittent Turbulence in Space Plasmas

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh21b0114c&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SH21B-0114

Mathematics

Logic

7807 Charged Particle Motion And Acceleration, 7827 Kinetic And Mhd Theory, 7839 Nonlinear Phenomena, 7843 Numerical Simulation Studies, 7863 Turbulence

Scientific paper

The "physics of complexity" in space plasmas is the central theme of this exposition. It is demonstrated that the sporadic and localized interactions of magnetic coherent structures arising from the plasma resonances can be the source for the coexistence of nonpropagating spatiotemporal fluctuations and propagating modes. Non-Gaussian probability distribution functions of the intermittent fluctuations from direct numerical simulations are obtained and discussed. Power spectra and local intermittency measures using the wavelet analyses are presented to display the spottiness of the small-scale turbulent fluctuations and the non-uniformity of coarse-grained dissipation that can lead to magnetic topological reconfigurations. The technique of the dynamic renormalization group is applied to the study of the scaling properties of such type of multiscale fluctuations. Charged particle interactions with both the propagating and nonpropagating portions of the intermittent turbulence are also described. Illustrative examples are provided.

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