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dc.contributor.authorBond, D.
dc.contributor.authorWheatley, V.
dc.contributor.authorLi, Y.
dc.contributor.authorSamtaney, Ravi
dc.contributor.authorPullin, D. I.
dc.date.accessioned2020-10-01T10:33:07Z
dc.date.available2020-10-01T10:33:07Z
dc.date.issued2020-09-30
dc.date.submitted2020-02-02
dc.identifier.citationBond, D., Wheatley, V., Li, Y., Samtaney, R., & Pullin, D. I. (2020). The magnetised Richtmyer–Meshkov instability in two-fluid plasmas. Journal of Fluid Mechanics, 903. doi:10.1017/jfm.2020.661
dc.identifier.issn0022-1120
dc.identifier.issn1469-7645
dc.identifier.doi10.1017/jfm.2020.661
dc.identifier.urihttp://hdl.handle.net/10754/665397
dc.description.abstractWe investigate the effects of magnetisation on the two-fluid plasma Richtmyer–Meshkov instability of a single-mode thermal interface using a computational approach. The initial magnetic field is normal to the mean interface location. Results are presented for a magnetic interaction parameter of 0.1 and plasma skin depths ranging from 0.1 to 10 perturbation wavelengths. These are compared to initially unmagnetised and neutral fluid cases. The electron flow is found to be constrained to lie along the magnetic field lines resulting in significant longitudinal flow features that interact strongly with the ion fluid. The presence of an initial magnetic field is shown to suppress the growth of the initial interface perturbation with effectiveness determined by plasma length scale. Suppression of the instability is attributed to the magnetic field’s contribution to the Lorentz force. This acts to rotate the vorticity vector in each fluid about the local magnetic-field vector leading to cyclic inversion and transport of the out-of-plane vorticity that drives perturbation growth. The transport of vorticity along field lines increases with decreasing plasma length scales and the wave packets responsible for vorticity transport begin to coalesce. In general, the two-fluid plasma Richtmyer–Meshkov instability is found to be suppressed through the action of the imposed magnetic field with increasing effectiveness as plasma length scale is decreased. For the conditions investigated, a critical skin depth for instability suppression is estimated.
dc.description.sponsorshipThis research was supported by the KAUST Office of Sponsored Research under Award URF/1/3418-01.
dc.publisherCambridge University Press (CUP)
dc.relation.urlhttps://www.cambridge.org/core/product/identifier/S0022112020006618/type/journal_article
dc.rightsArchived with thanks to Journal of Fluid Mechanics
dc.titleThe magnetised Richtmyer–Meshkov instability in two-fluid plasmas
dc.typeArticle
dc.contributor.departmentFluid and Plasma Simulation Group (FPS)
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalJournal of Fluid Mechanics
dc.rights.embargodate2021-03-30
dc.eprint.versionPost-print
dc.contributor.institutionCentre for Hypersonics, School of Mechanical and Mining Engineering, University of Queensland, Brisbane, Queensland, Australia.
dc.contributor.institutionGraduate Aerospace Laboratories, California Institute of Technology, Pasadena, CA 91125, USA.
dc.identifier.volume903
kaust.personLi, Y.
kaust.personSamtaney, Ravi
kaust.grant.numberURF/1/3418-01
dc.date.accepted2020-07-31
kaust.acknowledged.supportUnitKAUST Office of Sponsored Research
dc.date.published-online2020-09-30
dc.date.published-print2020-11-25


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