Richtmyer-Meshkov instability of an imploding flow with a two-fluid plasma model

Y. Li, Ravi Samtaney, D. Bond, V. Wheatley

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4 Scopus citations


The two-fluid (ions and electrons) plasma Richtmyer-Meshkov instability of a cylindrical light-heavy density interface is numerically investigated without an initial magnetic field. Varying the Debye length scale, we examine the effects of the coupling between the electron and ion fluids. When the coupling becomes strong, the electrons are restricted to co-move with the ions and the resulting evolution is similar to the hydrodynamic neutral fluid case. The charge separation that occurs between the electrons and ions is responsible for the self-generated electromagnetic fields. We show that the Biermann battery effect dominates the generation of magnetic field when the coupling between the electrons and ions is weak. In addition to the Rayleigh-Taylor stabilization effect during flow deceleration, the interfaces are accelerated by the induced spatiotemporally varying Lorentz force. As a consequence, the perturbations develop into the Rayleigh-Taylor instability, leading to an enhancement of the perturbation amplitude compared with the hydrodynamic case.
Original languageEnglish (US)
JournalPhysical Review Fluids
Issue number11
StatePublished - Nov 20 2020

Bibliographical note

KAUST Repository Item: Exported on 2020-11-24
Acknowledged KAUST grant number(s): URF/1/3418-01
Acknowledgements: This research was supported by the KAUST Office of Sponsored Research under Award URF/1/3418-01.


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