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

Bond, D. and Wheatley, V. and Samtaney, R. and Pullin, D. I. (2017) Richtmyer–Meshkov instability of a thermal interface in a two-fluid plasma. Journal of Fluid Mechanics, 833 . pp. 332-363. ISSN 0022-1120. http://resolver.caltech.edu/CaltechAUTHORS:20171116-111902831

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1017/jfm.2017.693DOIArticle
https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/richtmyermeshkov-instability-of-a-thermal-interface-in-a-twofluid-plasma/D299302275D7B51135189706D3FDAA81PublisherArticle
ORCID:
AuthorORCID
Bond, D.0000-0001-5261-3720
Additional Information:© 2017 Cambridge University Press. Received 29 November 2016; revised 24 September 2017; accepted 25 September 2017. 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.
Funders:
Funding AgencyGrant Number
King Abdullah University of Science and Technology (KAUST)URF/1/2162-01
Australian GovernmentUNSPECIFIED
Subject Keywords:instability, MHD and electrohydrodynamics
Record Number:CaltechAUTHORS:20171116-111902831
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20171116-111902831
Official Citation:Bond, D., Wheatley, V., Samtaney, R., & Pullin, D. (2017). Richtmyer–Meshkov instability of a thermal interface in a two-fluid plasma. Journal of Fluid Mechanics, 833, 332-363. doi:10.1017/jfm.2017.693
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:83254
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:16 Nov 2017 19:34
Last Modified:16 Nov 2017 19:34

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