High speed PLIF study of the Richtmyer–Meshkov instability upon re-shock

Noble, Christopher; Herzog, Joshua; Ames, Alex; Oakley, Jason; Rothamer, David; Bonazza, Riccardo

doi:10.1016/j.physd.2020.132519

Cited by 14 publications

(14 citation statements)

References 24 publications

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“…The results presented here use measurements from three experiments which are a subset of a set of eight experiments described by Noble et al [12], sharing experimental setups and IC creation with Weber et al [9] and Reese et al [10]. These three are chosen for study here as they have similar Atwood and Mach number but different IC modal contents.…”

Section: Resultsmentioning

confidence: 99%

“…This was derived in Appendix A of the study by Noble et al [12] and is the form of transport equation used by Ristorcelli et al [15] where Re h ¼ hh/v is the outer scale Reynolds number and Sc ¼ =D is the Schmidt number with being the kinematic viscosity.…”

Section: Nondimensionalization Of Governing Equationsmentioning

confidence: 99%

“…The current dataset has previously been used to analyze the evolution of moments of the light gas mole fraction field by Noble et al [12] and has been used as an experimental example of an iterative fluorescence correction scheme to extract estimates of the light gas mole fraction by Herzog et al [13].…”

Section: Introductionmentioning

confidence: 99%

“…Parameters of high-speed experiments, adapted from Ref [12]. where in that paper HS1 is HS4, HS2 is HS6, and HS3 is HS8…”

mentioning

confidence: 99%

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Scalar Power Spectra and Scalar Structure Function Evolution in the Richtmyer–Meshkov Instability Upon Reshock

Noble

Herzog

Rothamer

et al. 2020

Journal of Fluids Engineering

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The Richtmyer-Meshkov instability (RMI) of a twice-shocked gas interface is studied using high-speed planar laser-induced fluorescence (PLIF) in the Wisconsin Shock Tube Laboratory's vertical shock tube. The initial condition (IC) is a shear layer with broadband diffuse perturbations at the interface between a helium-acetone mixture and argon. This IC is accelerated by a shock of nominal strength M = 1.9, and then accelerated again by the transmitted shock that reflects off the end wall of the tube. Three individual experiments are analyzed, the energy spectrum and the structure functions of the light gas mole fraction field are calculated and compared.

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Section: Resultsmentioning

confidence: 99%

Section: Nondimensionalization Of Governing Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Parameters of high-speed experiments, adapted from Ref [12]. where in that paper HS1 is HS4, HS2 is HS6, and HS3 is HS8…”

mentioning

confidence: 99%

See 2 more Smart Citations

Scalar Power Spectra and Scalar Structure Function Evolution in the Richtmyer–Meshkov Instability Upon Reshock

Noble

Herzog

Rothamer

et al. 2020

Journal of Fluids Engineering

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“…From conservation equation for mass fraction of diffusive multi-species component [25], the evolution of density self-correlation (DSC) of turbulent mixing in RM flows is investigated [26], suggesting a form of equilibrium of DSC as the onset of mixing transition. Recently, Nobel [27] applied normalized scalar transport equation to propose a model that predicts the growth rate of a shocked mixing width. The view of transport equation of mass fraction and density offers the new perspective in the research of RM type mixing.…”

Section: Introductionmentioning

confidence: 99%

Scaling behavior of density gradient accelerated mixing rate in shock bubble interaction

Yu,

Liu,

Liu

2020

Preprint

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Variable density mixing in shock bubble interaction, a canonical flow of so-called Richtermyer-Meshkov instability, is studied by high-resolution simulation. While scalar mixing is mainly controlled by dissipation, an objective definition of variable density mixing rate characterizing the macroscopic mixing formation is still lacking and the fundamental behavior of mixing rate evolution is not yet well understood. Here, we show that the widely-accepted hyperbolic conservation of first moment of concentration in scalar mixing is violated in variable density mixing. We combine the compositional advection diffusion equation and divergence relation for miscible flows to provide evidence that the existence of density gradient accelerated dissipation and redistributed diffusion contributes to the anomalous decrease of mean concentration of species. Analyzing a number of simulations for a broad range of shock Mach number and Reynolds number, density gradient accelerated mixing rate exhibits, in the regime of Pelect number concerned, nearly independent of Pelect number, which paves a new way to understand variable density effect on the connection between global and local mixing behavior.

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Research Activities at the Wisconsin Shock Tube Laboratory

Bonazza

2022

Frontiers of Shock Wave Research

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High speed PLIF study of the Richtmyer–Meshkov instability upon re-shock

Cited by 14 publications

References 24 publications

Scalar Power Spectra and Scalar Structure Function Evolution in the Richtmyer–Meshkov Instability Upon Reshock

Scalar Power Spectra and Scalar Structure Function Evolution in the Richtmyer–Meshkov Instability Upon Reshock

Scaling behavior of density gradient accelerated mixing rate in shock bubble interaction

Research Activities at the Wisconsin Shock Tube Laboratory

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