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Title: Three-Dimensional Design Simulations of a High-Energy Density Reshock Experiment at the National Ignition Facility

Journal Article · · Journal of Fluids Engineering
DOI:https://doi.org/10.1115/1.4038532· OSTI ID:1511231
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

We present here simulations of a new experimental platform at the National Ignition Facility (NIF) for studying the hydrodynamic instability growth of a high-energy density (HED) fluid interface that undergoes multiple shocks, i.e., is “reshocked.” In these experiments, indirect-drive laser cavities drive strong shocks through an initially solid, planar interface between a high-density plastic and low-density foam, in either one or both directions. The first shock turns the system into an unstable fluid interface with the premachined initial condition that then grows via the Richtmyer–Meshkov and Rayleigh–Taylor instabilities. Backlit X-ray imaging is used to visualize the instability growth at different times. Our main result is that this new HED reshock platform is established and that the initial data confirm the experiment operates in a hydrodynamic regime similar to what simulations predict. The simulations also reveal new types of edge effects that can disturb the experiment at late times and suggest ways to mitigate them.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396; AC52-07NA27344
OSTI ID:
1511231
Report Number(s):
LA-UR-18-22092
Journal Information:
Journal of Fluids Engineering, Vol. 140, Issue 4; ISSN 0098-2202
Publisher:
ASMECopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

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Cited By (2)

Turbulent mixing and transition criteria of flows induced by hydrodynamic instabilities journal August 2019
Rayleigh–Taylor instabilities in high-energy density settings on the National Ignition Facility journal June 2018