UNSPECIFIED. (2001) Numerical simulations of kink instability in line-tied coronal Loops. ASTRONOMY & ASTROPHYSICS, 373 (3). pp. 1089-1098. ISSN 1432-0746

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Abstract

The results from numerical simulations carried out using a new shock-capturing, Lagrangian-remap, 3D MHD code, Lare3d are presented. We study the evolution of the m = 1 kink mode instability in a photospherically line-tied coronal loop that has no net axial current. During the non-linear evolution of the kink instability, large current concentrations develop in the neighbourhood of the infinite length mode rational surface. We investigate whether this strong current saturates at a finite value or whether scaling indicates current sheet formation. In particular, we consider the effect of the shear, defined by r phi'/phi where phi = LBtheta/rB(z) is the fieldline twist of the loop, on the current concentration. We also include a non-uniform resistivity in the simulations and observe the amount of free magnetic energy released by magnetic reconnection.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Journal or Publication Title:	ASTRONOMY & ASTROPHYSICS
Publisher:	E D P SCIENCES
ISSN:	1432-0746
Date:	July 2001
Volume:	373
Number:	3
Number of Pages:	10
Page Range:	pp. 1089-1098
Identification Number:	10.1051/0004-6361:20010678
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/11957

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