A Comparison of Fluid and Kinetic Models for Steady Magnetic Reconnection

Details A Comparison of Fluid and Kinetic Models for Steady Magnetic Reconnection A Comparison of Fluid and Kinetic Models for Steady Magnetic Reconnection

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm51c1824b&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM51C-1824

Physics

[2723] Magnetospheric Physics / Magnetic Reconnection, [2753] Magnetospheric Physics / Numerical Modeling

Scientific paper

Agreement is shown between steady-state kinetic solutions for reconnection [1] and a two-fluid, magneto-hydrodynamic model. The kinetic solutions are for a Harris sheet in two dimensions with prescribed inflow and free outflow. The fluid model with both electron and ion tensor pressures and isotropization is solved from the inflow boundary to the flow stagnation or X-point along a symmetry line. The fluid and kinetic inductive, inertial and off-diagonal pressure contributions to the electric field agree when the isotropization time is comparable to the electron plasma period. Because of symmetry, the Hall term is absent in 1D, the ion and electron flow remains coupled, and ion and electron scales are insensitive to the mass ratio in disagreement with kinetic results [2]. 1. Ishizawa et al., Phys. Plasmas 11(2004) 3579. 2. Ishizawa and Horiuchi, Phys. Rev. Lett. 95 (2005)45003. This material is based upon work supported by the National Science Foundation under Grant No. 000908494. The terms in Ohm's law from a 1D fluid model with pressure isotropization in 0.1 electron plasma periods.
The terms in Ohm's law from a 2D steady-state, kinetic simulation [1].

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