The transverse field Richtmyer-Meshkov instability in magnetohydrodynamics

Wheatley, V., Samtaney, R., Pullin, D. I. and Gehre, R. M. (2014) The transverse field Richtmyer-Meshkov instability in magnetohydrodynamics. Physics of Fluids, 26 1: . doi:10.1063/1.4851255


Author Wheatley, V.
Samtaney, R.
Pullin, D. I.
Gehre, R. M.
Title The transverse field Richtmyer-Meshkov instability in magnetohydrodynamics
Journal name Physics of Fluids   Check publisher's open access policy
ISSN 1070-6631
1089-7666
Publication date 2014-01
Year available 2014
Sub-type Article (original research)
DOI 10.1063/1.4851255
Open Access Status DOI
Volume 26
Issue 1
Total pages 17
Place of publication College Park, MD United States
Publisher American Institute of Physics
Collection year 2015
Language eng
Formatted abstract
 The magnetohydrodynamic Richtmyer-Meshkov instability is investigated for the case where the initial magnetic field is unperturbed and aligned with the mean interface location. For this initial condition, the magnetic field lines penetrate the perturbed density interface, forbidding a tangential velocity jump and therefore the presence of a vortex sheet. Through simulation, we find that the vorticity distribution present on the interface immediately after the shock acceleration breaks up into waves traveling parallel and anti-parallel to the magnetic field, which transport the vorticity. The interference of these waves as they propagate causes the perturbation amplitude of the interface to oscillate in time. This interface behavior is accurately predicted over a broad range of parameters by an incompressible linearized model derived presently by solving the corresponding impulse driven, linearized initial value problem. Our use of an equilibrium initial condition results in interface motion produced solely by the impulsive acceleration. Nonlinear compressible simulations are used to investigate the behavior of the transverse field magnetohydrodynamic Richtmyer-Meshkov instability, and the performance of the incompressible model, over a range of shock strengths, magnetic field strengths, perturbation amplitudes and Atwood numbers.
Keyword Inertial Confinement Fusion
Magnetic Field
Shock
Astrophysics
Ignition
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2015 Collection
 
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