Richtmyer–Meshkov instability of a thermal interface in a two-fluid plasma

Handle URI:
http://hdl.handle.net/10754/626641
Title:
Richtmyer–Meshkov instability of a thermal interface in a two-fluid plasma
Authors:
Bond, D. ( 0000-0001-5261-3720 ) ; Wheatley, V.; Samtaney, Ravi ( 0000-0002-4702-6473 ) ; Pullin, D. I.
Abstract:
We computationally investigate the Richtmyer–Meshkov instability of a density interface with a single-mode perturbation in a two-fluid, ion–electron plasma with no initial magnetic field. Self-generated magnetic fields arise subsequently. We study the case where the density jump across the initial interface is due to a thermal discontinuity, and select plasma parameters for which two-fluid plasma effects are expected to be significant in order to elucidate how they alter the instability. The instability is driven via a Riemann problem generated precursor electron shock that impacts the density interface ahead of the ion shock. The resultant charge separation and motion generates electromagnetic fields that cause the electron shock to degenerate and periodically accelerate the electron and ion interfaces, driving Rayleigh–Taylor instability. This generates small-scale structures and substantially increases interfacial growth over the hydrodynamic case.
KAUST Department:
Mechanical Engineering Program; Physical Sciences and Engineering (PSE) Division
Citation:
Bond D, Wheatley V, Samtaney R, Pullin DI (2017) Richtmyer–Meshkov instability of a thermal interface in a two-fluid plasma. Journal of Fluid Mechanics 833: 332–363. Available: http://dx.doi.org/10.1017/jfm.2017.693.
Publisher:
Cambridge University Press (CUP)
Journal:
Journal of Fluid Mechanics
KAUST Grant Number:
URF/1/2162-01
Issue Date:
3-Nov-2017
DOI:
10.1017/jfm.2017.693
Type:
Article
ISSN:
0022-1120; 1469-7645
Sponsors:
This research was supported by the KAUST Office of Sponsored Research under Award URF/1/2162-01. This work was supported by computational resources provided by the Australian Government under the National Computational Merit Allocation Scheme.
Additional Links:
https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/richtmyermeshkov-instability-of-a-thermal-interface-in-a-twofluid-plasma/D299302275D7B51135189706D3FDAA81
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorBond, D.en
dc.contributor.authorWheatley, V.en
dc.contributor.authorSamtaney, Ravien
dc.contributor.authorPullin, D. I.en
dc.date.accessioned2018-01-01T12:19:05Z-
dc.date.available2018-01-01T12:19:05Z-
dc.date.issued2017-11-03en
dc.identifier.citationBond D, Wheatley V, Samtaney R, Pullin DI (2017) Richtmyer–Meshkov instability of a thermal interface in a two-fluid plasma. Journal of Fluid Mechanics 833: 332–363. Available: http://dx.doi.org/10.1017/jfm.2017.693.en
dc.identifier.issn0022-1120en
dc.identifier.issn1469-7645en
dc.identifier.doi10.1017/jfm.2017.693en
dc.identifier.urihttp://hdl.handle.net/10754/626641-
dc.description.abstractWe computationally investigate the Richtmyer–Meshkov instability of a density interface with a single-mode perturbation in a two-fluid, ion–electron plasma with no initial magnetic field. Self-generated magnetic fields arise subsequently. We study the case where the density jump across the initial interface is due to a thermal discontinuity, and select plasma parameters for which two-fluid plasma effects are expected to be significant in order to elucidate how they alter the instability. The instability is driven via a Riemann problem generated precursor electron shock that impacts the density interface ahead of the ion shock. The resultant charge separation and motion generates electromagnetic fields that cause the electron shock to degenerate and periodically accelerate the electron and ion interfaces, driving Rayleigh–Taylor instability. This generates small-scale structures and substantially increases interfacial growth over the hydrodynamic case.en
dc.description.sponsorshipThis research was supported by the KAUST Office of Sponsored Research under Award URF/1/2162-01. This work was supported by computational resources provided by the Australian Government under the National Computational Merit Allocation Scheme.en
dc.publisherCambridge University Press (CUP)en
dc.relation.urlhttps://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/richtmyermeshkov-instability-of-a-thermal-interface-in-a-twofluid-plasma/D299302275D7B51135189706D3FDAA81en
dc.subjectinstabilityen
dc.subjectMHD and electrohydrodynamicsen
dc.titleRichtmyer–Meshkov instability of a thermal interface in a two-fluid plasmaen
dc.typeArticleen
dc.contributor.departmentMechanical Engineering Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJournal of Fluid Mechanicsen
dc.contributor.institutionCentre for Hypersonics, School of Mechanical and Mining Engineering, The University of Queensland, St Lucia Qld 4072, Australiaen
dc.contributor.institutionGraduate Aerospace laboratories, California Institute of Technology, Pasadena, CA 91125, USAen
kaust.authorSamtaney, Ravien
kaust.grant.numberURF/1/2162-01en
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