Physics – Plasma Physics
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phflb...4.2270z&link_type=abstract
(APS Division of Plasma Physics, Annual Meeting, 33rd, Tampa, FL, Nov. 4-8, 1991) Physics of Fluids B (ISSN 0899-8213), vol. 4,
Physics
Plasma Physics
1
Heavy Ions, Heliosphere, Interplanetary Medium, Shock Wave Propagation, Comet Nuclei, Magnetohydrodynamic Waves, Particle Mass, Rankine-Hugoniot Relation, Shock Fronts, Solar System
Scientific paper
Mass-loading fronts represent a new class of shocks which is found frequently in the solar system, both at the head of comets and upstream of weakly and nonmagnetized planets, and which has not yet been investigated in great detail. Here, a general theoretical description of mass-loading shocks (MLSs) in the heliosphere is presented and the difference between MLSs and classical nonreacting MHD shock are elucidated. It is found that the momentum contribution of added mass within the shock represents a physically important effect, particularly in the shock strength regime observed at Comets Halley and GZ. The mass-loading MHD Rankine-Hugoniot conditions are not tangentially invariant, so mass-loading fronts are subjected to shearing stresses, greatly curtailing the upstream parameter regime for which stable transitions are possible. The existence of fast and slow mode compound mass-loading fronts is predicted. Other forms of mass-loading fronts exist for which no classical MHD counterparts exist.
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