Computer Science
Scientific paper
Jul 1973
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973p%26ss...21.1151f&link_type=abstract
Planetary and Space Science, Volume 21, Issue 7, p. 1151-1178.
Computer Science
11
Scientific paper
Time-dependent incompressible MHD solutions in two dimensions are obtained numerically to study the evolutionary process involving a re-connexion of magnetic lines of force. Given an initial antiparallel magnetic field, or a current sheet, to which there is an injection of fluid in a transverse direction, we seek to see how the process of re-connexion builds up. In this numerical experiment, special considerations are given to the confirmation of reconnexion, the formation of X-type magnetic field, the speed of growth, conditions that control the evolution, acceleration of particles, the structure of the diffusion region and so forth. The findings are: magnetic lines of force can re-connect and grow to the X-type configuration in fluids of any finitely large hydromagnetic and hydrodynamic Reynolds numbers; the conditions local to the neutral point are less important than the boundary conditions that set up global flow patterns; acceleration of fluid in bulk only concerns whether the X-type configuration grows to the comparably large extent or not; the electric field at the neutral point due to the rapidly changing magnetic field is less efficient in accelerating charged particles. The National Centre for Atmospheric Research is sponsored by the National Science Foundation.
Fukao Shoichiro
Tsuda Teruhisa
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