doi:info:doi/10.1063/1.872419

Compressible magnetohydrodynamic Kelvin–Helmholtz instability with vortex pairing in the two-dimensional transverse configuration 利用統計を見る

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アイテムタイプ	学術雑誌論文 / Journal Article
言語	英語
キーワード	plasma magnetohydrodynamics, HELMHOLTZ INSTABILITY, MAGNETOHYDRODYNAMICS, TWO-DIMENSIONAL CALCULATIONS, COMPRESSION, CONVECTION, VISCOSITY, VORTICES, PLASMA INSTABILITY, PLASMA SIMULATION
著者	Miura Akira
著者所属	Department of Earth and Planetary Physics, University of Tokyo
抄録	For a two-dimensional (2-D) transverse configuration, where the plasma motion occurs in a 2-D plane transverse to the magnetic field, the nonlinear evolution of the magnetohydrodynamic (MHD) Kelvin–Helmholtz (K–H) instability is investigated by means of a 2-D MHD simulation for a convective fast magnetosonic Mach number 0.35, which is defined for the total jump of the flow velocity. The compressibility and the nonzero baroclinic vector are shown to violate the conservation of the enstrophy for the 2-D MHD transverse configuration and for the 2-D fluid motion. After the nonlinear saturation of the linearly fastest growing vortices, the vortices continue to coalesce until no more vortex pairing is allowed, owing to a finite length of the simulation system. The plasma inside the vortex is rarefied strongly by the fast magnetosonic rarefaction and each vortex is associated with an eddy current, which is inertia current in nature. The plasma flow velocity is enhanced at the periphery of the vortex and the net momentum transport and shear relaxation by the instability occur as long as the vortex pairing continues. Anomalous viscosity by the K–H instability increases with the vortex pairing and its increase is due to the growth of subharmonic modes. © 1997 American Institute of Physics.
雑誌名	Physics of plasmas
巻	4
号	8
ページ	2871 - 2885
発行年	1997-08
ISSN	1070664X
書誌レコードID	AA10987555
DOI	info:doi/10.1063/1.872419
権利	© 1997 American Institute of Physics
日本十進分類法	450
出版者	American Institute of Physics
異版である	http://doi.org/10.1063/1.872419

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Compressible magnetohydrodynamic Kelvin–Helmholtz instability with vortex pairing in the two-dimensional transverse configuration 利用統計を見る

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