Computer Science – Performance
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmsm33b..01d&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SM33B-01
Computer Science
Performance
2411 Electric Fields (2712), 2704 Auroral Phenomena (2407), 2712 Electric Fields (2411), 2753 Numerical Modeling, 2764 Plasma Sheet
Scientific paper
We have developed a 2-Dimensional particle-in-cell code for simulating auroral potential structure extending over a few thousand kilometers in altitude and about 50km in latitude. The code employs high performance parallel computing, and it includes effect of mirror force both on electrons and ions. We have attempted two types of parallelization using horizontal and vertical domain decomposition. Since, the plasma density greatly varies with height and also it undergoes modification during the simulation time, vertical (altitude) decomposition is found to be inefficient due to load imbalance among the processors. On the other hand, horizontal (latitude) decomposition is found to be comparatively much more efficient. We will present details of the parallelization method as well as some selected results on potential structures of double layers as found in the return current region of the aurora. Specifically, we have studied propagation of electron holes over long distances. The electron holes form just above the double layer near the bottom of the simulation region and they propagate upward a few thousand kilometers. Evolution of electron distribution with the electron hole propagation is studied. We also study the acceleration and deceleration of the electron holes due to density gradients.
Arcot K. S.
Deverapalli C. M.
Germany Glynn A.
Singh Navinder
Wells Earl B.
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