Ion inertia effect on the Kelvin-Helmholtz instability

Details Ion inertia effect on the Kelvin-Helmholtz instability Ion inertia effect on the Kelvin-Helmholtz instability

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9615725f&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Sept. 1, 1991, p. 15,725-15,734.

Physics

26

Hall Effect, Kelvin-Helmholtz Instability, Plasma Composition, Shear Layers, Two Fluid Models, Flux Transfer Events, Geomagnetism, Magnetohydrodynamics, Magnetopause, Tearing Modes (Plasmas)

Scientific paper

Results are reported from an experimental study analyzing the Kelvin-Helmholtz instability in a thin velocity shear layer in a two-fluid plasma. Electrons are treated as a massless charge-neutralizing fluid, and the ion inertia effects appearing through the Hall term and the electron pressure term in the generalized Ohm's law are added to the usual MHD equation system. Linear equations are derived and solved numerically for the parallel and the perpendicular geometries. Although the growth rates are only slightly affected by the ion inertia effect for both configurations, the structures of the eigenmodes become highly different when the modes have spatial dependences along the background magnetic field. The implications of the present results for the magnetopause boundary layer are discussed.

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