On the discontinuity in kinetic solutions of the collisionless polar wind

Details On the discontinuity in kinetic solutions of the collisionless polar wind On the discontinuity in kinetic solutions of the collisionless polar wind

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1837k&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Oct. 1991, p. 1837-1840.

Physics

3

Collisionless Plasmas, Flow Velocity, Geomagnetism, Magnetohydrodynamic Flow, Polar Regions, Solar Terrestrial Interactions, Angular Momentum, Discontinuity, Ion Distribution, Kinetics, Liouville Theorem, Maxwell-Boltzmann Density Function, Velocity Distribution

Scientific paper

The use of a Maxwellian ion velocity distribution in kinetic solutions of the collisionless polar wind regime results in a velocity distribution and associated moments that display sharp discontinuities at the boundary, which quantitatively affects the solution at high altitudes. This paper investigates the causes of this discontinuity, using both analytical and numerical approaches; it is shown that the choice of appropriate boundary conditions will eliminate the discontinuity.

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