Physics
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.1581d&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 97, Feb. 1, 1992, p. 1581-1595.
Physics
16
Polar Regions, Solar Wind, Space Plasmas, Thermal Plasmas, Transport Theory, Boltzmann Transport Equation, Collisionless Plasmas, Subsonic Flow
Scientific paper
In order to gain a better understanding of the relative merits of the transport and kinetic approaches to modeling thermal space plasmas, a comparison is presented of a transport (bi-Maxwellian-based 16-moment equations) and a semikinetic description of supersonic flow in the solar wind and also of both supersonic and subsonic flows in the polar wind for 'steady state' conditions. The study shows: remarkable agreement between the two models for supersonic collisionless flows, even for the higher-order moments; the inadequacy of the semikinetic approach for modeling subsonic flows; and the superiority of the 16-moment transport over the semikinetic approach for modeling the solar wind. Further evidence that the bi-Maxwellian-based transport equations are a useful tool for studying 'thermal' space plasmas that develop non-Maxwellian features is provided.
Demars Howard G.
Schunk Robert W.
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