Visco-resistive shear wave dissipation in magnetic X-points

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dc.contributor.authorFruit, G.
dc.contributor.authorCraig, Ian J.D.
dc.date.accessioned2011-06-28T22:30:02Z
dc.date.available2011-06-28T22:30:02Z
dc.date.issued2006
dc.description.abstractWe consider the viscous and resistive dissipation of perpendicularly polarized shear waves propagating within a planar magnetic X-point. To highlight the role played by the two-dimensional geometry, the damping of travelling Alfvèn waves that propagate within an unbounded, but non-orthogonal X-point topology is analyzed. It is shown that the separatrix geometry affects both the dissipation time and the visco-resistive scaling of the energy decay. Our main focus, however, is on developing a theoretical description of standing wave dissipation for orthogonal, line-tied X-points. A combination of numerical and analytic treatments confirms that phase mixing provides a very effective mechanism for dissipating the wave energy. We show that wave decay comprises two main phases, an initial rapid decay followed by slower eigenmode evolution, both of which are only weakly dependent on the visco-resistive damping coefficients.en_NZ
dc.format.mimetypeapplication/pdf
dc.identifier.citationFruit, G. & Craig, I.J.D. (2006). Visco-resistive shear wave dissipation in magnetic X-points. Astronomy & Astrophysics, 448(2), 753-761.en_NZ
dc.identifier.doi10.1051/0004-6361:20054228en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/5429
dc.language.isoen
dc.publisherE D P Sciencesen_NZ
dc.relation.isPartOfAstronomy and Astrophysicsen_NZ
dc.rightsThis article has been published in the journal: Astronomy & Astrophysics. Used with permission.en_NZ
dc.subjectmagnetic fieldsen_NZ
dc.subjectmagnetohydrodynamicsen_NZ
dc.subjectplasmasen_NZ
dc.subjectcoronaen_NZ
dc.titleVisco-resistive shear wave dissipation in magnetic X-pointsen_NZ
dc.typeJournal Articleen_NZ
pubs.begin-page753en_NZ
pubs.editionMarch IIIen_NZ
pubs.elements-id32113
pubs.end-page761en_NZ
pubs.issue2en_NZ
pubs.volume448en_NZ
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