Show simple item record  

dc.contributor.authorCraig, Ian J.D.
dc.contributor.authorHeerikhuisen, J.
dc.contributor.authorWatson, P.G.
dc.date.accessioned2008-11-04T03:41:28Z
dc.date.available2008-11-04T03:41:28Z
dc.date.issued2003-04-16
dc.identifier.citationOughton, S., Dmitruk, P. & Matthaeus, W. H. (2003). Hall current effects in dynamic magnetic reconnection solutions. Physics of Plasmas, 10, 3120 .en_US
dc.identifier.issn1070-664X
dc.identifier.urihttps://hdl.handle.net/10289/1270
dc.description.abstractThe impact of Hall current contributions on flow driven planar magnetic merging solutions is discussed. The Hall current is important if the dimensionless Hall parameter (or normalized ion skin depth) satisfies cH>η where η is the inverse Lundquist number for the plasma. A dynamic analysis of the problem shows, however, that the Hall current initially manifests itself, not by modifying the planar reconnection field, but by inducing a non-reconnecting perpendicular "separator" component in the magnetic field. Only if the stronger condition c2/H > η is satisfied can Hall currents be expected to affect the planar merging. These analytic predictions are then tested by performing a series of numerical experiments in periodic geometry, using the full system of planar magnetohydrodynamic (MHD) equations. The numerical results confirm that the nature of the merging changes dramatically when the Hall coupling satisfies c2/H > η. In line with the analytic treatment of sheared reconnection, the coupling provided by the Hall term leads to the emergence of multiple current layers that can enhance the global Ohmic dissipation at the expense of the reconnection rate. However, the details of the dissipation depend critically on the symmetries of the simulation, and when the merging is "head-on" (i.e., comprises fourfold symmetry) the reconnection rate can be enhanced.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherAmerican Institute of Physicsen_NZ
dc.relation.urihttp://link.aip.org/link/?PHPAEN/10/3120/1en_US
dc.rightsCopyright 2003 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in the journal Physics of Plasmas and may be found at http://jmp.aip.org/jmp/top.jspen_US
dc.subjectmathematicsen_US
dc.subjectplasma magnetohydrodynamicsen_US
dc.subjectplasma transport processesen_US
dc.subjectplasma simulationen_US
dc.titleHall current effects in dynamic magnetic reconnection solutionsen_US
dc.typeJournal Articleen_US
dc.identifier.doi10.1063/1.1590980en_US
dc.relation.isPartOfPhysics of Plasmasen_NZ
pubs.begin-page3120en_NZ
pubs.editionAugusten_NZ
pubs.elements-id31366
pubs.end-page3130en_NZ
pubs.issue8en_NZ
pubs.volume10en_NZ


Files in this item

This item appears in the following Collection(s)

Show simple item record