A Two Fluid Code to Study Cross Scale Coupling in Collisionless Magnetic Reconnection

Details A Two Fluid Code to Study Cross Scale Coupling in Collisionless Magnetic Reconnection A Two Fluid Code to Study Cross Scale Coupling in Collisionless Magnetic Reconnection

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm51b1813j&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM51B-1813

Physics

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

Scientific paper

In collisionless systems such as in the Earth’s magnetotail and magnetopause, the reconnection of magnetic field lines is initiated in a thin current sheet with thickness of the order of electron skin depth, embedded in a thicker current sheet. The magnetic reconnection evolves from an early time-dependent phase to a quasi-steady phase and the electron and ion processes couple across space and time scales. The simulations of the early phase show the development of new structures, e. g., nested structure of quadrupoles of Hall magnetic field and triple peak structure of the current sheet on electron space and time scales. The study of the coupling of these structures to ion scales requires simulations in which both electron and ion dynamics are well represented. A two-fluid model which represents full electron and ion dynamics and a procedure for its numerical simulations is developed. The divergence of electron pressure tensor is included in the electron momentum equation to capture the effects of non-gyrotropic processes. The preliminary results from the step by step development of the two fluid code will be presented.

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