Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm31a1694l&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM31A-1694
Physics
0654 Plasmas, 2129 Interplanetary Dust, 2723 Magnetic Reconnection (7526, 7835), 6213 Dust, 7833 Mathematical And Numerical Techniques (0500, 3200)
Scientific paper
Simulations of magnetic reconnection in a dusty plasma were conducted across a Harris-like current sheet. These simulations were conducted with the DENISIS 4-fluid dusty magnetoplasma code. The simulations begin with a Harris-like current sheet which goes through a ballistic relaxation process. This allows the system to achieve suitable pressure profiles. Multiple resistive models were employed. These included global resistivity, a locally enhanced resistivity, parameter dependent dynamic resistivity, and explicit use of collision frequencies in the induction equation. Magnetic topology, mass fluxes, and magnetic fluxes were examined throughout the simulations. These simulations indicate that while the assumptions of the Sweet- Parker and Petschek models of reconnection may be correct on small timescales, the overall process of reconnection across a current sheet can be highly dynamic. This includes reformation of current sheets on smaller scales after reconnection and multiple reconnection events across a dynamic sheet.
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