Kelvin Helmholtz instability in a magnetoplasma

Details Kelvin Helmholtz instability in a magnetoplasma Kelvin Helmholtz instability in a magnetoplasma

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978itps....6..355m&link_type=abstract

IEEE Transactions on Plasma Science, vol. PS-6, Dec. 1978, p. 355-359.

Statistics

Applications

Fluid Boundaries, Kelvin-Helmholtz Instability, Magnetohydrodynamic Flow, Magnetohydrodynamic Stability, Plasma-Electromagnetic Interaction, Shear Flow, Auroral Arcs, Earth Magnetosphere, Electrostatics, Plasma Waves, Wave Dispersion

Scientific paper

Two dimensional transverse Kelvin-Helmholtz (K-H) instability has been studied at the interface between the two fluids (plasma medium) of finite thickness in a relative motion to each other. The perturbations on the interface are assumed to be electromagnetic and a dispersion relation is obtained. The interface (boundary) has been found to be unstable for a wide range of perturbation wavelengths (wave numbers kx, ky). It is shown that the modification introduced by electromagnetic (quasi-electrostatic) perturbations in comparison to electrostatic one is to reduce the growth rate of perturbations. The growth rate maximizes when kx = ky. The applications of this study have been discussed to explain some of the observed ionospheric (auroral arc formation) and magnetospheric (unstable magnetopause boundary, hydromagnetic pulsations) phenomena.

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