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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
Historic
Publication Date:
2007
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 http://hawaiilibrary.net/


Description
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.

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

Excerpt
Armstrong, J. W., Cordes, J. M., and Rickett, B. J.: Density power spectrum in the local interstellar medium, Nature, 291, 561–564, 1981.; Armstrong, J. W., Rickett, B. J, and Spangler, S.: Electron density power spectrum in the local interstellar medium, ApJ, 443, 209–221, 1995.; Bayly, B. J., Levermore, C. D., and Passot, T.: Density variations in weakly compressible flows, Phys. Fluids, A4, 945–954, 1992.; Bhattacharjee, A., Ng, C. S., and Spangler, S. R.: ApJ, 494, 409–418, 1998.; Cho, J. and Lazarian, A.: Compressible magnetohydrodynamic turbulence: mode coupling, scaling relations, anisotropy, viscosity-damped regime and astrophysical implications, MNRAS, 345, 325–339, 2003.; Dastgeer, S. and Zank, G. P.: Density Spectrum in the Diffuse Interstellar Medium and Solar Wind, ApJ, 602, L29–L32, 2004.; Dastgeer, S. and Zank, G. P.: Anisotropic Density Fluctuations in a Nearly Incompressible Hydrodynamic Fluid, ApJ, 604, L125–L128, 2004.; Dastgeer, S. and Zank, G. P.: Nonlinear flows in nearly incompressible hydrodynamic fluids, Phys. Rev. E., 69, 066309-1–066309-5, doi:10.1103/PhysRevE.69.066309, 2004.; Dastgeer, S. and Zank, G. P.: Nonlinear structures, spectral features, and correlations in a nearly incompressible hydrodynamic fluid, Phys. Fluids, 18, 045105, doi:10.1063/1.2191878, 2006.; Dastgeer, S. and Zank, G. P.: The Transition to Incompressibility from Compressible Turbulence, ApJ, 640, L195–L198, 2006.; Ghosh, S., Hossain, M., and Matthaeus, W. H.: The application of spectral methods in simulating compressible fluid and magnetofluid turbulence, Computer Phys. Comm. 74, 18–40, 1993.; Gottlieb, D. and Orszag, S. A.: Numerical Analysis of Spectral Methods: Theory and Applications (NSF-CBMS Monograph 26; Philadelphia: SIAM), 1977.; Higdon, J. C.: Density fluctuations in the interstellar medium: Evidence for anisotropic magnetogasdynamic turbulence. I – Model and astrophysical sites, 285, 109–123, 1984.; Klainerman, S., and Majda, A.: Compressible and Incompressible Fluids, Commun. Pure Appl. Math. 35, 629–651, 1982.; Higdon, J. C.: Density fluctuations in the interstellar medium: Evidence for anisotropic magnetogasdynamic turbulence. II – Stationary structures, 309, 342–361, 1986.; Klainerman, S. and Majda, A.: Singular limits of quasilinear hyperbolic systems with large parameters and the incompressible limit of compressible fluids, Commun. Pure Appl. Math. 34, 481–524, 1981.; Kida, S. and Orszag, A.: Energy and spectral dynamics in forced compressible turbulence, J. Sci. Comp., 5, 85, 1990.; Kolmogorov, A. N.: On degeneration of isotropic turbulence in an incompressible viscous liquid, Dokl. Akad. Nauk SSSR, 31, 538–541, 1941.; Kraichnan, R. H.: Inertial range spectrum in hydromagnetic turbulence, Phys. Fluids, 8, 1385–1387, 1965.; Kreiss, H. -O.: Problems with different time scales for partial differential equations, Commun. Pure Appl. Math, 33, 399–439, 1982.; Lighthill, M. J.: On sound generated aerodynamically I, General theory, Proc. R. Soc. London Ser., A 211, 564–587, 1952.; Lithwick, Y. and Goldreich, P.: Compressible Magnetohydrodynamic Turbulence in Interstellar Plasmas, ApJ, 562, 279–296, 2001.; Mac Low, M.-M., Klessen, R. S., Burkert, A., and Smith, M. D.: Kinetic energy decay rates of supersonic and super alfvenic turbulence in star-forming clouds, Phys. Rev. Lett., 80, 2754, 1998.; Mac Low, M.-M.: The energy dissipation rate of supersonic, magnetohydrodynamic turbulence in molecular clouds, Astrophys. J., 524, 169–178, 1999.; Majda, A.: Compressible Fluid Flow and Systems of Conservation Laws in Several Space Variables (Springer, New York), 1–172, 1984.; Matthaeus, W. H. and Brown, M.: Nearly incompressible magnetohydrodynamics at low Mach number, Phys. Fluids, 31, 3634&ndas

 

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