Ion viscous effects on magnetosonic shock

Details Ion viscous effects on magnetosonic shock Ion viscous effects on magnetosonic shock

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984angeo...2..377l&link_type=abstract

Annales Geophysicae (ISSN 0755-0685), vol. 2, May-June 1984, p. 377-381. Research supported by the Southwest Research Institute.

Physics

1

Bow Waves, Ion Motion, Magnetoacoustic Waves, Magnetohydrodynamics, Plasma Diffusion, Shock Waves, Cold Plasmas, High Temperature Plasmas, Magnetic Fields, Mathematical Models, Viscosity

Scientific paper

Profiles of magnetic field and plasma bulk velocity associated with perpendicular shocks are investigated theoretically by solving magnetohydrodynamic equations. The main dissipation mechanism is assumed to be due to ion viscosity. Shock structures with zero temperatures and finite pressure are examined separately. The numerical solutions indicate that ion viscosity tends to smooth profiles of magnetic field and bulk velocity for high Mach number shocks. For smaller ion viscosity and lower Mach number, a damped wave train would appear downstream. The results suggest that kinetic effects such as ion reflections and microturbulence are necessary in order to explain magnetic field overshoots as well as oscillatory magnetic-field structure in high Mach number shocks.

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