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Title: Influences of sub-Alfvenic shear flows on nonlinear evolution of magnetic reconnection in compressible plasmas

Abstract

Influences of sub-Alfvenic shear flows on the nonlinear evolution of the magnetic reconnection are studied in the framework of compressible resistive MHD and compressible Hall MHD. It is found for the first time that the sub-Alfvenic shear flow can either stabilize or destabilize magnetic reconnection, which is mainly determined by the plasma beta and the half thickness of the shear flow ({lambda}{sub v}). The shear flow exhibits a suppressing effect on magnetic reconnection and the boosting effect nearly disappears for the beta plasma {beta} < or approx. 1, which is associated with the presence of a pair of discontinuities in the upper and lower inflow region. The shear flow has the boosting effect on magnetic reconnection when the half thickness of the shear flow exceeds a critical value in the high beta plasma which is in a good agreement with the results from incompressible simulation. With the inclusion of the Hall effect, shear flow can still either stabilize or destabilize magnetic reconnection, but the boosting effect becomes weaker as the ion inertial length d{sub i} increases.

Authors:
; ; ; ;  [1]
  1. Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027 (China)
Publication Date:
OSTI Identifier:
22043478
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 18; Journal Issue: 9; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALFVEN WAVES; HALF-THICKNESS; HALL EFFECT; HIGH-BETA PLASMA; INCLUSIONS; IONS; MAGNETIC RECONNECTION; MAGNETOHYDRODYNAMICS; NONLINEAR PROBLEMS; PLASMA INSTABILITY; PLASMA SIMULATION

Citation Formats

Zhang, X., Li, L. J., Wang, L. C., Li, J. H., and Ma, Z. W. Influences of sub-Alfvenic shear flows on nonlinear evolution of magnetic reconnection in compressible plasmas. United States: N. p., 2011. Web. doi:10.1063/1.3643792.
Zhang, X., Li, L. J., Wang, L. C., Li, J. H., & Ma, Z. W. Influences of sub-Alfvenic shear flows on nonlinear evolution of magnetic reconnection in compressible plasmas. United States. doi:10.1063/1.3643792.
Zhang, X., Li, L. J., Wang, L. C., Li, J. H., and Ma, Z. W. Thu . "Influences of sub-Alfvenic shear flows on nonlinear evolution of magnetic reconnection in compressible plasmas". United States. doi:10.1063/1.3643792.
@article{osti_22043478,
title = {Influences of sub-Alfvenic shear flows on nonlinear evolution of magnetic reconnection in compressible plasmas},
author = {Zhang, X. and Li, L. J. and Wang, L. C. and Li, J. H. and Ma, Z. W.},
abstractNote = {Influences of sub-Alfvenic shear flows on the nonlinear evolution of the magnetic reconnection are studied in the framework of compressible resistive MHD and compressible Hall MHD. It is found for the first time that the sub-Alfvenic shear flow can either stabilize or destabilize magnetic reconnection, which is mainly determined by the plasma beta and the half thickness of the shear flow ({lambda}{sub v}). The shear flow exhibits a suppressing effect on magnetic reconnection and the boosting effect nearly disappears for the beta plasma {beta} < or approx. 1, which is associated with the presence of a pair of discontinuities in the upper and lower inflow region. The shear flow has the boosting effect on magnetic reconnection when the half thickness of the shear flow exceeds a critical value in the high beta plasma which is in a good agreement with the results from incompressible simulation. With the inclusion of the Hall effect, shear flow can still either stabilize or destabilize magnetic reconnection, but the boosting effect becomes weaker as the ion inertial length d{sub i} increases.},
doi = {10.1063/1.3643792},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 9,
volume = 18,
place = {United States},
year = {2011},
month = {9}
}