Detailed temperature diagnostic studies for Radishock and COAX experiments

Fryer, Chris L.; Wood, Suzannah R.; Coffing, Shane; Robey, H. F.; Fontes, Christopher J.; Johns, Heather; Kozłowski, Paweł; Urbatsch, Todd; Lanier, N. E.; Meyerhofer, D. D.; Byvank, Tom

doi:10.1016/j.hedp.2022.101023

Cited by 4 publications

(1 citation statement)

References 21 publications

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“…The next step in this analysis is to consider how well the proposed ROM captures the essential macroscopic physics of the travelling wave. The F-C test problem mimics the important class of high-temperature laser driven radiation shock experiments [88,125,126,127,128]. One metric of particular importance in these studies is the breakout time of radiation [88,126].…”

Section: Analysis Of Radiation Wave Propagationmentioning

confidence: 99%

Reduced order models for thermal radiative transfer problems based on moment equations and data-driven approximations of the Eddington tensor

Coale

Anistratov

2023

Journal of Quantitative Spectroscopy and Radiative Transfer

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Section: Analysis Of Radiation Wave Propagationmentioning

confidence: 99%

Reduced order models for thermal radiative transfer problems based on moment equations and data-driven approximations of the Eddington tensor

Coale

Anistratov

2023

Journal of Quantitative Spectroscopy and Radiative Transfer

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A reduced-order model for nonlinear radiative transfer problems based on moment equations and POD-Petrov-Galerkin projection of the normalized Boltzmann transport equation

Coale,

Anistratov

2024

Journal of Computational Physics

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Design of experiments to spectroscopically characterize radiation flow in stochastic media

Byvank,

Coffing,

Lioce

et al. 2024

Physics of Plasmas

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Precise characterization of experimental radiation flow is required to validate the high energy density physics models, numerical methods, and codes that are used to simulate radiation-hydrodynamics phenomena such as thermal radiation transport in stochastic media. The Cassio code is used to simulate thermal radiation flow through inhomogeneous, stochastic-media-foam configurations containing optically thick clumps dispersed within an optically thin background aerogel. Cassio can model small inhomogeneous problems directly, but most problems require approximations to meet computer limitations on run-times and memory usage. Various examples of these approximations are methods that produce, in one calculation, an ensemble-averaged solution and associated standard deviation; reduced spatial dimensionality with approximate geometries; and full material homogenization with no geometric detail. Cassio simulations are used to design experiments at the OMEGA-60 Laser Facility that can measure the radiation flow using the spatially resolved COAX absorption spectroscopy diagnostic. The experimental platforms flow radiation through foam targets ranging from a background-only aerogel, to a single configuration of a specified stochastic medium, to a fully homogenized foam of the background and clump materials. Under constant total clump mass, larger clumps (here, larger than 10 μm diameter) will mix more slowly with the background such that the bulk radiation flow is faster than it would be in a fully homogenized material. The COAX platform can be used to infer temperature and density profiles in both the background material and clumps, simultaneously, and therefore to differentiate radiation flow in a range of stochastic and homogeneous media.

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Detailed temperature diagnostic studies for Radishock and COAX experiments

Cited by 4 publications

References 21 publications

Reduced order models for thermal radiative transfer problems based on moment equations and data-driven approximations of the Eddington tensor

Reduced order models for thermal radiative transfer problems based on moment equations and data-driven approximations of the Eddington tensor

A reduced-order model for nonlinear radiative transfer problems based on moment equations and POD-Petrov-Galerkin projection of the normalized Boltzmann transport equation

Design of experiments to spectroscopically characterize radiation flow in stochastic media

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