Anomalous transport by magnetohydrodynamic Kelvin-Helmholtz instabilities in the solar wind-magnetosphere interaction

Details Anomalous transport by magnetohydrodynamic Kelvin-Helmholtz instabilities in the solar wind-magnetosphere interaction Anomalous transport by magnetohydrodynamic Kelvin-Helmholtz instabilities in the solar wind-magnetosphere interaction

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89..801m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Feb. 1, 1984, p. 801-818.

Computer Science

Sound

172

Kelvin-Helmholtz Instability, Magnetohydrodynamic Stability, Magnetospheric Instability, Plasma Dynamics, Solar Terrestrial Interactions, Solar Wind, Flow Velocity, Mach Number, Magnetohydrodynamics, Magnetosheath, Plasma Waves, Pressure Distribution, Reynolds Stress, Shear Flow

Scientific paper

The high latitude, or downstream flank, and dayside low latitude magnetospheric boundaries are modeled in an MHD simulation of Kelvin-Helmholtz instablities in a compressible plasma for parallel and transverse configurations. Detailed attention is given to the nonlinear consequences of the instabilities for several different Alfven and sound Mach numbers in both configurations. Emphasis is given to the anomalous transport of momentum and energy by the Kelvin-Helmholtz instabilities across the magnetospheric boundary, which is crucial in evaluating the instabilities' contribution to magnetospheric convection. It is concluded that the anomalous tangential stress at the magnetospheric boundary caused by the instability may be of the order of 1 percent of the magnetosheath flow momentum adjacent to the boundary, and gives a contribution to the convection potential drop over the polar cap of 10-30 kV.

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