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Three-dimensional Simulations of Turbulent Spectra in the Local Interstellar Medium : Volume 14, Issue 4 (06/07/2007)

By Shaikh, D.

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Book Id: WPLBN0004019834
Format Type: PDF Article :
File Size: Pages 9
Reproduction Date: 2015

Title: Three-dimensional Simulations of Turbulent Spectra in the Local Interstellar Medium : Volume 14, Issue 4 (06/07/2007)  
Author: Shaikh, D.
Volume: Vol. 14, Issue 4
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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Zank, G. P., & Shaikh, D. (2007). Three-dimensional Simulations of Turbulent Spectra in the Local Interstellar Medium : Volume 14, Issue 4 (06/07/2007). Retrieved from

Description: Institute of Geophysics and Planetary Physics, University of California, Riverside CA 92521, USA. Three-dimensional time dependent numerical simulations of compressible magnetohydrodynamic fluids describing super-Alfvénic, supersonic and strongly magnetized space and laboratory plasmas show a nonlinear relaxation towards a state of near incompressibility. The latter is characterized essentially by a subsonic turbulent Mach number. This transition is mediated dynamically by disparate spectral energy dissipation rates in compressible magnetosonic and shear Alfvénic modes. Nonlinear cascades lead to super-Alfvénic turbulent motions decaying to a sub-Alfvénic regime that couples weakly with (magneto)acoustic cascades. Consequently, the supersonic plasma motion is transformed into highly subsonic motion and density fluctuations experience a passive convection. This model provides a self-consistent explaination of the ubiquitous nature of incompressible magnetoplasma fluctuations in the solar wind and the interstellar medium.

Three-dimensional simulations of turbulent spectra in the local interstellar medium

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