Magnetohydrodynamic implosion symmetry and suppression of Richtmyer-Meshkov instability in an octahedrally symmetric field

Mostert, W.; Pullin, D. I.; Wheatley, V.; Samtaney, Ravi

Magnetohydrodynamic implosion symmetry and suppression of Richtmyer-Meshkov instability in an octahedrally symmetric field

Files

PhysRevFluids.2.013701.pdf (3.08 MB)

Type

Article

Authors

Mostert, W.
Pullin, D. I.
Wheatley, V.
Samtaney, Ravi

KAUST Department

Fluid and Plasma Simulation Group (FPS)
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division

KAUST Grant Number

URF/1/2162-01

Date

2017-01-26

Abstract

We present numerical simulations of ideal magnetohydrodynamics showing suppression of the Richtmyer-Meshkov instability in spherical implosions in the presence of an octahedrally symmetric magnetic field. This field configuration is of interest owing to its high degree of spherical symmetry in comparison with previously considered dihedrally symmetric fields. The simulations indicate that the octahedral field suppresses the instability comparably to the other previously considered candidate fields for light-heavy interface accelerations while retaining a highly symmetric underlying flow even at high field strengths. With this field, there is a reduction in the root-mean-square perturbation amplitude of up to approximately 50% at representative time under the strongest field tested while maintaining a homogeneous suppression pattern compared to the other candidate fields.

Citation

Mostert W, Pullin DI, Wheatley V, Samtaney R (2017) Magnetohydrodynamic implosion symmetry and suppression of Richtmyer-Meshkov instability in an octahedrally symmetric field. Physical Review Fluids 2. Available: http://dx.doi.org/10.1103/physrevfluids.2.013701.

Acknowledgements

This research was supported by the KAUST Office of Sponsored Research under Award No. URF/1/2162-01. V.W. acknowledges support from an Australian Research Council Discovery Early Career Researcher Award (Project No. DE120102942).