Statistics – Computation
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsm51a..11g&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SM51A-11
Statistics
Computation
7843 Numerical Simulation Studies, 7859 Transport Processes, 7871 Waves And Instabilities, 2431 Ionosphere/Magnetosphere Interactions (2736)
Scientific paper
The polar wind plasma outflow can be affected by the interaction of thermal and auroral plasma while convecting through the auroral region. This interaction would lead to plasma energization and multi-scale plasma structure and dynamics. To simulate these 3D effects, we have used our multi-scale, time-dependent, 16-moment transport model with horizontal convection. Multi-scale, multi-moment fluid models incorporate features of both small-scale kinetic and large-scale transport models to describe multi-scale polar wind plasma dynamics with an acceptable computation complexity. Our model, which include temperature anisotropy, anisotropic heat flows, and anomalous effects due to kinetic instabilities, have been successfully applied to large scale modeling of the polar wind, auroral return current regions, magnetosphere-ionosphere coupling, and potential structures generation. These models have been formulated for the stationary flux tubes. However, horizontal convection is an important aspect of the high-latitude ionosphere-polar wind system, since typical time scale of the polar wind outflow is comparable to its transit time across the polar cap. We have generalized our multi-moment model with micro-processes to include self-consistent horizontal convection. Simulation results for realistic 3-D dynamics of the polar wind system for various ionospheric and magnetospheric conditions will be presented.
Ganguli Supriya B.
Gavrichtchaka V. V.
Novakovskaya E.
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