Shock analysis - Three useful new relations

Details Shock analysis - Three useful new relations Shock analysis - Three useful new relations

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.2730s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, April 1, 1988, p. 2730-2734.

Physics

12

Plasma Interactions, Plasma Waves, Shock Wave Propagation, Space Plasmas, Magnetic Fields, Propagation Velocity, Rankine-Hugoniot Relation

Scientific paper

The behavior of collisionless hydromagnetic shocks in interplanetary space is considered analytically, with a focus on relations, implicit in the governing Rankine-Hugoniot equations, involving the magnetic field (B) and the plasma velocity (V). A moving reference frame aligned with the shock is employed, and expressions are derived which make it possible (1) to determine the speed of a shock of arbitrary orientation from upstream and downstream measurements of B and V; (2) to characterize the change in flow direction as the plasma crosses the shock in terms of the plasma beta, the Mach number, and the angle between the upstream field and the shock normal; and (3) to infer the third component of the upstream-downstream velocity jump from B and two-dimensional V measurements. These expressions are applied to ISEE-3 data on an interplanetary shock on April 5, 1979, and the results are presented in tables.

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