Supernova Hydrodynamics: A Lab-scale Study of the Blast-driven Instability Using High-speed Diagnostics

Musci, Benjamin; Petter, Samuel; Pathikonda, Gokul; Ochs, Bradley A.; Ranjan, Devesh

doi:10.3847/1538-4357/ab8f8f

Cited by 10 publications

(12 citation statements)

References 53 publications

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“…Over the past decades, RM instability has attracted widespread attention due to its significance in academic research, e.g. compressible turbulence (Mohaghar et al 2019;Groom & Thornber 2021) and vortex dynamics (Peng et al 2021), as well as the important role in industrial fields such as inertial confinement fusion (ICF) (Betti & Hurricane 2016).…”

Section: Introductionmentioning

confidence: 99%

Divergent Richtmyer–Meshkov instability on a heavy gas layer

Zhang

Ding

et al. 2023

J. Fluid Mech.

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Experiments on divergent Richtmyer–Meshkov (RM) instability at a heavy gas layer are performed in a specially designed shock tube. A novel soap-film technique is extended to generate gas layers with controllable thicknesses and shapes. An unperturbed gas layer is first examined and its two interfaces are found to move uniformly at the early stage and be decelerated later. A general one-dimensional theory applicable to an arbitrary-thickness layer is established, which gives a good prediction of the layer motion in divergent geometry. Then, six kinds of perturbed SF $_6$ layers with various thicknesses and shapes surrounded by air are examined. At the early stage, the amplitude growths of the inner interface for various-thickness layers collapse quite well and also can be predicted by the Bell model for cylindrical RM instability at a single interface, which indicates a negligible interface coupling effect. Later, a rarefaction wave accelerates the inner interface, causing a dramatic rise in the growth rate. It is found that a thicker gas layer will result in a larger extent that the rarefaction wave can promote the instability growth. A modified Bell model accounting for both Rayleigh–Taylor (RT) instability and interface stretching caused by a rarefaction wave is established, which well reproduces the quick instability growth. At late stages, reverberating waves inside the layer are negligibly weak such that the inner interface growth is dominated by RM instability and RT stability. The major factors driving the outer interface development are a compression wave and interface coupling. A new interface coupling phenomenon existing uniquely in divergent geometry caused by the gradual thinning of the gas layer is observed and also modelled.

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Section: Introductionmentioning

confidence: 99%

Divergent Richtmyer–Meshkov instability on a heavy gas layer

Zhang

Ding

et al. 2023

J. Fluid Mech.

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“…The growth rate matches in both magnitude and general shape, where large changes in growth rate (regimes) are seen to occur at the same time in LES and experiment. For instance, the initial negative growth-rate at the earliest of times displays the ability of the LES to capture the phase-inversion which the BDI undergoes (due to the BW passing from higher to lower density fluid) [40]. This inversion is challenging for analytic and theoretical models to capture correctly, so it is encouraging to see it replicated so well by the LES.…”

Section: Discussionmentioning

confidence: 99%

“…The experimental facility used to acquire the validation data has been detailed and characterized previously in Musci et al [40], but will be briefly summarized here. Figure 1 shows a photo, schematics, and examples of initial conditions produced by the experimental facility.…”

Section: A Facility and Data Overviewmentioning

confidence: 99%

“…A user specified quantity of total energy is placed inside a small sphere which declines steeply (following a radial Gaussian profile) to the ambient at the radius. The motivation behind this method being that releasing a large amount of energy in such a small space, would allow the simulation to form a Taylor-Sedov BW [41,42], which has been shown to be produced by the experiments [40]. The radius and location of the energy pill were motivated by the actual size and location of the detonator used in the experiments.…”

Section: Boundary and Initial Conditionsmentioning

confidence: 99%

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Multi-fidelity validation of variable-density turbulent mixing models

Musci¹,

Olson²,

Petter³

et al. 2022

Preprint

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In this study, ensembles of experimental data are presented and utilized to compare and validate two models used in the simulation of variable density, compressible turbulent mixing. Though models of this kind (Reynolds Averaged Navier-Stokes and Large-Eddy Simulations) have been validated extensively with more canonical flows in previous studies, the present approach offers novelty in the complexity of the geometry, the ensemble based validation, and the uniformity of the computational framework on which the models are tested. Moreover, all experimental and computational tasks were completed by the authors which has led to a tightly coupled experimental configuration with its "digital twin." The experimental divergent-shock-tube facility and its data acquisition methods are described and replicated in simulation space. A 2D Euler model which neglects the turbulent mixing at the interface is optimized to experimental data using a Gaussian process. This model then serves as the basis for both the 2D RANS and 3D LES studies that make comparisons to the mixing layer data from the experiment. RANS is shown to produce good agreement with experimental data only at late flow development times. The LES ensembles generally show good agreement with experimental data, but display sensitivity to the characterization of initial conditions. Resolution dependent behavior is also observed for certain higher-order statistics of interest. Overall, the LES model successfully captures the effects of divergent geometry, compressibility, and combined non-linear instabilities inherent to the problem. The successful prediction of mixing width and its growth rate highlight the existence of three distinct regimes in the development of the instability, each with similarities to previously studied instabilities.

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“…It should be noted that controlled high explosion is used to study the hydrodynamic instability driven by blast wave passage [102] . The size of gases is around 20 cm, much larger than the laser micro shock tube of about 1 mm.…”

Section: Blast Waves Of Astrophysical Explosionsmentioning

confidence: 99%

Recent progress of laboratory astrophysics with intense lasers

Takabe

Kuramitsu

2021

High Pow Laser Sci Eng

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Thanks to a rapid progress of high-power lasers soon after the birth of laser by T. H. Maiman in 1960, intense lasers have been developed mainly for studying scientific feasibility of the laser fusion in the world wide. Inertial confinement fusion with intense laser has attracted attention as a new future energy after two oil crises from 1970s -1980s. From the beginning, the most challenging physics is known to be the hydrodynamic instability to realize the spherical implosion to achieve more than 1000 times the solid density. A lot of studies have been carried out theoretically and experimentally on the hydrodynamic instability and resultant turbulent mixing of compressible fluids. During such activities in laboratory, the explosion of supernova SN1987A was observed in the sky on February 23, 1987. The x-ray satellites have revealed that the hydrodynamic instability is a key issue to understand the physics of supernova explosion. After strong interaction of laser plasma researchers and astrophysicists, the laboratory astrophysics with intense lasers has been proposed and promoted around the end of 1990s. The original subject was mainly related to hydrodynamic instabilities. However, after two decades of the laboratory astrophysics research, we can now find a diversity of its research topics. It has been demonstrated that a variety of nonlinear physics of collisionless plasmas can be studied in laser ablation plasmas in the last decade theoretically and experimentally. In the present paper, we shed light on the recent ten topics intensively studied in laboratory experiments. Brief review is given by citing recent papers. Then, modeling cosmic-ray acceleration with lasers is reviewed in a following session as a special topic to be the coming main topics in laboratory astrophysics research.

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Supernova Hydrodynamics: A Lab-scale Study of the Blast-driven Instability Using High-speed Diagnostics

Cited by 10 publications

References 53 publications

Divergent Richtmyer–Meshkov instability on a heavy gas layer

Divergent Richtmyer–Meshkov instability on a heavy gas layer

Multi-fidelity validation of variable-density turbulent mixing models

Recent progress of laboratory astrophysics with intense lasers

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