Evolution of corotating stream structures in the heliospheric equatorial plane

Details Evolution of corotating stream structures in the heliospheric equatorial plane Evolution of corotating stream structures in the heliospheric equatorial plane

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....9813201h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A8, p. 13,201-13,214.

Physics

12

Heliosphere, Magnetohydrodynamic Flow, Rotating Plasmas, Shock Wave Interaction, Solar Wind, Mathematical Models, Rankine-Hugoniot Relation, Supersonic Flow, Two Dimensional Flow

Scientific paper

This paper develops a numerical method and applies it to the study of corotating high-speed streams in the equatorial plane of the heliosphere from 0.3 AU up to 10 AU, where corotating shocks undergo processes of formation, development and interaction. The numerical method is designed specially for solving two-dimensional steady supersonic magnetohydrodynamic flows, and it has two distinguishing features: (1) the conservation laws are maintained with high precision along the streamlines, and (2) a shock or a tangential discontinuity is treated as a surface with zero thickness, using the Rankine-Hugoniot relations to directly match the flow conditions upstream and downstream. By using this method, the whole physical picture of the corotating high-speed streams is constructed throughout the domain of 0.3-10 AU for several specific theoretical examples. Our simulation unifies previous simulations which were limited to either the near-sun region within 1 AU or the far region outside several AU. In addition, several new physical features and processes are revealed by this study, especially those concerning the global geometry and the detailed evolution of the corotating shocks.

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