Solutions to biMaxwellian transport equations for the polar wind
Abstract
In the past, the polar wind has been simulated using transport equations based on either a Maxwellian or a biMaxwellian velocity distribution function. Previous solutions obtained for both the Maxwellianbased 13moment set of equations and the biMaxwellianbased 16moment set of equations have indicated that these two approaches are in close agreement with each other. However, due to the numerical problems involved in solving the transport equations, the solutions obtained were few in number and represented only a small subset of the possible range of polar wind behavior. In this study, we obtained polar wind solutions for a broad range of O ^{+} density, H ^{+} drift velocity, electron temperature and H ^{+} temperature boundary conditions. We used the biMaxwellianbased 16moment set of transport equations, since this set is expected to be superior to Maxwellianbased equations in describing large temperature anisotropies and heat flows. Our solutions corroborate the earlier results when similar boundary conditions are used. Also, for previously unexplored combinations of boundary conditions, our solutions are often qualitatively different from any obtained before.
 Publication:

Planetary and Space Science
 Pub Date:
 January 1989
 DOI:
 10.1016/00320633(89)900718
 Bibcode:
 1989P&SS...37...85D
 Keywords:

 Ion Motion;
 Magnetospheric Ion Density;
 Polar Regions;
 Solar Terrestrial Interactions;
 Solar Wind;
 Electron Energy;
 Hydrogen Ions;
 Ion Temperature;
 Maxwell Equation;
 Oxygen Ions;
 Transport Properties;
 Geophysics