Large scale EMF in current sheets induced by tearing modes

An extension of the analysis of resistive instabilities of a sheet pinch from a famous work by Furth et al (1963 Phys. Fluids 6 459) is presented here, to study the mean electromotive force (EMF) generated by the developing instability. In a Cartesian configuration and in the presence of a current s...

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Bibliographic Details
Published inFluid dynamics research Vol. 50; no. 1; pp. 11402 - 11418
Main Author Mizerski, Krzysztof A
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.02.2018
Subjects
dynamo theory
effect
sheet pinch instabilities
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Summary:An extension of the analysis of resistive instabilities of a sheet pinch from a famous work by Furth et al (1963 Phys. Fluids 6 459) is presented here, to study the mean electromotive force (EMF) generated by the developing instability. In a Cartesian configuration and in the presence of a current sheet first the boundary layer technique is used to obtain global, matched asymptotic solutions for the velocity and magnetic field and then the solutions are used to calculate the large-scale EMF in the system. It is reported, that in the bulk the curl of the mean EMF is linear in j 0 B 0 , a simple pseudo-scalar quantity constructed from the large-scale quantities.
Bibliography:The Japan Society of Fluid Mechanics
FDR-100123.R1
ISSN:0169-5983
1873-7005
DOI:10.1088/1873-7005/aa6ae0