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dc.contributor.authorWiesenberger, Matthias
dc.contributor.authorHeld, Markus
dc.contributor.authorKube, Ralph
dc.contributor.authorGarcia, Odd Erik
dc.date.accessioned2017-08-30T07:17:28Z
dc.date.available2017-08-30T07:17:28Z
dc.date.issued2017-06-14
dc.description.abstractWe study the dynamics of seeded plasma blobs and depletions in an (effective) gravitational field. For incompressible flows, the radial center of mass velocity of blobs and depletions is proportional to the square root of their initial cross-field size and amplitude. If the flows are compressible, this scaling holds only for ratios of amplitude to size larger than a critical value. Otherwise, the maximum blob and depletion velocity depends linearly on the initial amplitude and is independent of size. In both cases, the acceleration of blobs and depletions depends on their initial amplitude relative to the background plasma density and is proportional to gravity and independent of their cross-field size. Due to their reduced inertia plasma, depletions accelerate more quickly than the corresponding blobs. These scaling laws are derived from the invariants of the governing drift-fluid equations for blobs and agree excellently with numerical simulations over five orders of magnitude for both blobs and depletions. We suggest an empirical model that unifies and correctly captures the radial acceleration and maximum velocities of both blobs and depletions.en_US
dc.descriptionSource at <a href=http://dx.doi.org/10.1063/1.4985318> http://dx.doi.org/10.1063/1.4985318 </a>en_US
dc.identifier.citationWiesenberger M, Held, M, Kube R, Garcia OE. Unified transport scaling laws for plasma blobs and depletions. Physics of Plasmas. 2017;24en_US
dc.identifier.cristinIDFRIDAID 1489636
dc.identifier.doihttp://dx.doi.org/10.1063/1.4985318
dc.identifier.issn1070-664X
dc.identifier.issn1089-7674
dc.identifier.urihttps://hdl.handle.net/10037/11400
dc.language.isoengen_US
dc.publisherAIP Publishingen_US
dc.relation.journalPhysics of Plasmas
dc.relation.projectIDeu-repo/grantAgreement/RCN/FRINATEK/240510/Norway/TurbulenceAndTransportAtTheBoundaryOfFusionPlasmas//en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437en_US
dc.subjectVDP::Mathematics and natural science: 400::Physics: 430::Space and plasma physics: 437en_US
dc.titleUnified transport scaling laws for plasma blobs and depletionsen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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