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Model of Strong Stationary Vortex Turbulence in Space Plasmas : Volume 16, Issue 1 (22/01/2009)

By Aburjania, G. D.

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Book Id: WPLBN0003978392
Format Type: PDF Article :
File Size: Pages 12
Reproduction Date: 2015

Title: Model of Strong Stationary Vortex Turbulence in Space Plasmas : Volume 16, Issue 1 (22/01/2009)  
Author: Aburjania, G. D.
Volume: Vol. 16, Issue 1
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Chargazia, K. Z., Zimbardo, G., Zelenyi, L. M., & Aburjania, G. D. (2009). Model of Strong Stationary Vortex Turbulence in Space Plasmas : Volume 16, Issue 1 (22/01/2009). Retrieved from

Description: I. Javakhishvili Tbilisi State University,2 University str., 0143 Tbilisi, Georgia. This paper investigates the macroscopic consequences of nonlinear solitary vortex structures in magnetized space plasmas by developing theoretical model of plasma turbulence. Strongly localized vortex patterns contain trapped particles and, propagating in a medium, excite substantial density fluctuations and thus, intensify the energy, heat and mass transport processes, i.e., such vortices can form strong vortex turbulence. Turbulence is represented as an ensemble of strongly localized (and therefore weakly interacting) vortices. Vortices with various amplitudes are randomly distributed in space (due to collisions). For their description, a statistical approach is applied. It is supposed that a stationary turbulent state is formed by balancing competing effects: spontaneous development of vortices due to nonlinear twisting of the perturbations' fronts, cascading of perturbations into short scales (direct spectral cascade) and collisional or collisionless damping of the perturbations in the short-wave domain. In the inertial range, direct spectral cascade occurs through merging structures via collisions. It is shown that in the magneto-active plasmas, strong turbulence is generally anisotropic Turbulent modes mainly develop in the direction perpendicular to the local magnetic field. It is found that it is the compressibility of the local medium which primarily determines the character of the turbulent spectra: the strong vortex turbulence forms a power spectrum in wave number space. For example, a new spectrum of turbulent fluctuations in k−8/3 is derived which agrees with available experimental data. Within the framework of the developed model particle diffusion processes are also investigated. It is found that the interaction of structures with each other and particles causes anomalous diffusion in the medium. The effective coefficient of diffusion has a square root dependence on the stationary level of noise.

Model of strong stationary vortex turbulence in space plasmas

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