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Title: Numerical simulations of the two-dimensional multimode Richtmyer-Meshkov instability

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4915517· OSTI ID:1597613
 [1];  [2]
  1. Univ. of Sydney, NSW (Australia)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

We show the two-dimensional Richtmyer-Meshkov instability occurs as shock waves pass through a perturbed material interface, triggering transition to an inhomogeneous turbulence variable density flow. This paper presents a series of large-eddy-simulations of the two dimensional turbulent RM instability and compares the results to the fully three dimensional simulations. There are two aims for this paper, the first is to explore what numerical resolution is required for a statistically converged solution for a two dimensional inhomogeneous flow field. The second aim is to elucidate the key differences in flow physics between the two dimensional and three dimensional Richtmyer-Meshkov instabilities, particularly their asymptotic self-similar regime. Convergence is achieved using 64 independent realisations and grid resolutions up to 40962 in the plane. It is shown that for narrowband cases the growth rate θ = 0.48 which is substantially higher than the three-dimensional equivalent. Mix measures are consistently lower compared to three-dimensional, and the kinetic energy distribution is homogeneous at late time. The broadband case has a similar initial growth rate as the three-dimensional case, with a marginally lower θ = 0.63. Mix is similar in magnitude, but is reducing at late time. The spectra in both cases exhibit the dual-cascade expected from two-dimensional turbulence.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1597613
Alternate ID(s):
OSTI ID: 1228572
Report Number(s):
LLNL-JRNL-734607; PHPAEN; 886317; TRN: US2103150
Journal Information:
Physics of Plasmas, Vol. 22, Issue 3; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

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  • Drikakis, D.; Hahn, M.; Mosedale, A.
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 367, Issue 1899 https://doi.org/10.1098/rsta.2008.0312
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Cited By (3)

Reynolds number effects on the single-mode Richtmyer-Meshkov instability journal January 2017
Turbulent mixing and transition criteria of flows induced by hydrodynamic instabilities journal August 2019
Asymptotic behavior of the mixed mass in Rayleigh–Taylor and Richtmyer–Meshkov instability induced flows journal May 2016