Computer Science – Performance
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm31a05k&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SM31A-05
Computer Science
Performance
2748 Magnetotail Boundary Layers, 2753 Numerical Modeling, 7827 Kinetic And Mhd Theory, 7835 Magnetic Reconnection, 7859 Transport Processes
Scientific paper
A recent comparative study of collisionless magnetic reconnection demonstrated that two-fluid MHD simulations reasonably well reproduce the fast reconnection rates observed in kinetic simulations. The two-fluid treatment, however, may introduce a number of numerical complications and significantly slow down the performance, and, therefore, may not be applicable to many important applications in space and laboratory plasmas. The goal of our research is to obtain better insights in the physics of collisionless magnetic reconnection and to incorporate the most essential physics that controls fast reconnection into ideal single-fluid MHD models. We demonstrate that the reconnection rate is controlled by ion nongyrotropic behavior near the reconnection site and that it can be described in terms of nongyrotropic corrections to the magnetic induction equation. We modify the ideal MHD approach by allowing the ion fluid to be nongyrotropic. The results of 2D and 3D simulations will be demonstrated.
Birn Joachim
Hesse Matthias
Kuznetsova Masha
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