Generation of X-points and secondary islands in 2D magnetohydrodynamic turbulence

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dc.contributor.authorWan, Minping
dc.contributor.authorMatthaeus, William H.
dc.contributor.authorServidio, Sergio
dc.contributor.authorOughton, Sean
dc.date.accessioned2013-06-10T03:45:13Z
dc.date.available2013-06-10T03:45:13Z
dc.date.copyright2013
dc.date.issued2013
dc.description.abstractWe study the time development of the population of X-type critical points in a two-dimensional magnetohydrodynamic model during the early stages of freely decaying turbulence. At sufficiently high magnetic Reynolds number Rem, we find that the number of neutral points increases as Rem3/2, while the rates of reconnection at the most active sites decrease. The distribution of rates remains approximately exponential. We focus in particular on delicate issues of accuracy, which arise in these numerical experiments, in that the proliferation of X-points is also a feature of under-resolved simulations. The “splitting” of neutral points at high Reynolds number appears to be a fundamental feature of the cascade that has important implications for understanding the relationship between reconnection and turbulence, an issue of considerable importance for the Magnetospheric Multiscale and Solar Probe missions as well as observation of reconnection in the solar wind.en_NZ
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dc.identifier.citationWan, M., Matthaeus, W. H., Servidio, S., & Oughton, S. (2013). Generation of X-points and secondary islands in 2D magnetohydrodynamic turbulence. Physics of Plasmas, 20(4), 042307.en_NZ
dc.identifier.doi10.1063/1.4802985en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/7692
dc.language.isoenen_NZ
dc.publisherAIP Publishingen_NZ
dc.relation.isPartOfPhysics of Plasmasen_NZ
dc.relation.ispartofPhysics of Plasmas
dc.relation.urihttp://pop.aip.org/resource/1/phpaen/v20/i4/p042307_s1en_NZ
dc.rightsThis article has been published in the journal: Physics of Plasmas. © 2013 AIP Publishing LLC.en_NZ
dc.titleGeneration of X-points and secondary islands in 2D magnetohydrodynamic turbulenceen_NZ
dc.typeJournal Articleen_NZ
pubs.begin-page042307en_NZ
pubs.elements-id83902
pubs.end-page042307en_NZ
pubs.issue4en_NZ
pubs.volume20en_NZ
uow.identifier.article-noARTN 042307en_NZ
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