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Title: Computer studies on the spontaneous fast reconnection mechanism in three dimensions

Abstract

The spontaneous evolution of fast reconnection is studied in three dimensions by extending (in the {ital z} direction) the previous two-dimensional model that considered only the {ital x}-{ital y} plane [M. Ugai, Phys. Fluids B {bold 4}, 2953 (1992)]. It is demonstrated that the reconnection development strongly depends on three-dimensional effects; only when the central current sheet is sufficiently long in the {ital z} direction, say more than a few times larger than the current sheet width, the fast reconnection mechanism fully develops by the self-consistent coupling between the global reconnection flow and the current-driven anomalous resistivity. In this case, the reconnection flow can grow so powerfully as to enhance the current density (the current-driven resistivity) locally near an {ital X} line; otherwise, such a vital reconnection flow cannot be caused. The resulting quasisteady fast reconnection mechanism is significantly confined in the {ital z} direction, where a strong (Alfv{acute e}nic) plasma jet results from standing switch-off shocks; accordingly, a large-scale plasmoid is formed and propagates in the middle of the system. It is concluded that the well-known two-dimensional spontaneous fast reconnection model can reasonably be extended to three dimensions. {copyright} {ital 1996 American Institute of Physics.}

Authors:
;  [1]
  1. Department of Computer Science, Faculty of Engineering, Ehime University, Matsuyama 790 (Japan)
Publication Date:
OSTI Identifier:
278983
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 3; Journal Issue: 3; Other Information: PBD: Mar 1996
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; MAGNETIC RECONNECTION; PLASMA SIMULATION; PLASMA JETS; PLASMOIDS; SOLAR FLARES

Citation Formats

Ugai, M, and Shimizu, T. Computer studies on the spontaneous fast reconnection mechanism in three dimensions. United States: N. p., 1996. Web. doi:10.1063/1.871789.
Ugai, M, & Shimizu, T. Computer studies on the spontaneous fast reconnection mechanism in three dimensions. United States. https://doi.org/10.1063/1.871789
Ugai, M, and Shimizu, T. Fri . "Computer studies on the spontaneous fast reconnection mechanism in three dimensions". United States. https://doi.org/10.1063/1.871789.
@article{osti_278983,
title = {Computer studies on the spontaneous fast reconnection mechanism in three dimensions},
author = {Ugai, M and Shimizu, T},
abstractNote = {The spontaneous evolution of fast reconnection is studied in three dimensions by extending (in the {ital z} direction) the previous two-dimensional model that considered only the {ital x}-{ital y} plane [M. Ugai, Phys. Fluids B {bold 4}, 2953 (1992)]. It is demonstrated that the reconnection development strongly depends on three-dimensional effects; only when the central current sheet is sufficiently long in the {ital z} direction, say more than a few times larger than the current sheet width, the fast reconnection mechanism fully develops by the self-consistent coupling between the global reconnection flow and the current-driven anomalous resistivity. In this case, the reconnection flow can grow so powerfully as to enhance the current density (the current-driven resistivity) locally near an {ital X} line; otherwise, such a vital reconnection flow cannot be caused. The resulting quasisteady fast reconnection mechanism is significantly confined in the {ital z} direction, where a strong (Alfv{acute e}nic) plasma jet results from standing switch-off shocks; accordingly, a large-scale plasmoid is formed and propagates in the middle of the system. It is concluded that the well-known two-dimensional spontaneous fast reconnection model can reasonably be extended to three dimensions. {copyright} {ital 1996 American Institute of Physics.}},
doi = {10.1063/1.871789},
url = {https://www.osti.gov/biblio/278983}, journal = {Physics of Plasmas},
number = 3,
volume = 3,
place = {United States},
year = {1996},
month = {3}
}