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Title: Three- and two-dimensional simulations of counter-propagating shear experiments at high energy densities at the National Ignition Facility

Three- and two-dimensional numerical studies have been carried out to simulate recent counter-propagating shear flow experiments on the National Ignition Facility. A multi-physics three-dimensional, time-dependent radiation hydrodynamics simulation code is used. Using a Reynolds Averaging Navier-Stokes model, we show that the evolution of the mixing layer width obtained from the simulations agrees well with that measured from the experiments. A sensitivity study is conducted to illustrate a 3D geometrical effect that could confuse the measurement at late times, if the energy drives from the two ends of the shock tube are asymmetric. Implications for future experiments are discussed.
Authors:
; ; ; ;  [1] ; ;  [2]
  1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
  2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Publication Date:
OSTI Identifier:
22489844
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 11; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ASYMMETRY; COMPUTERIZED SIMULATION; ENERGY DENSITY; EXPERIMENTAL DATA; HYDRODYNAMICS; MIXING; NAVIER-STOKES EQUATIONS; NUMERICAL ANALYSIS; REYNOLDS NUMBER; SENSITIVITY ANALYSIS; SHEAR; SHOCK TUBES; THREE-DIMENSIONAL CALCULATIONS; TIME DEPENDENCE; TWO-DIMENSIONAL CALCULATIONS; US NATIONAL IGNITION FACILITY