A platform for thin-layer Richtmyer-Meshkov at OMEGA and the NIF

Desjardins, Tiffany; Stéfano, Carlos Di; Day, Thomas; Schmidt, D. W.; Merritt, Elizabeth; Doss, F. W.; Flippo, K. A.; Cárdenas, T.; DeVolder, B.G.; Donovan, P. M.; Edwards, Stephanie Lynn; Fierro, F.; Gonzales, R.; Goodwin, Lynne; Hamilton, Christopher E.; Quintana, T. E.; Randolph, R. B.; Rasmus, Alexander; Sedillo, T.; Wilson, Carol; Welser‐Sherrill, L.

doi:10.1016/j.hedp.2019.100705

Cited by 17 publications

(5 citation statements)

References 66 publications

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“…Haines et al (2013) conducted 3-D implicit large-eddy simulations of the Welser-Sherrill et al (2013) experiments. Recently, Desjardins et al (2019) presented a new experimental program to investigate mixing after three or more shocks.…”

Section: Introductionmentioning

confidence: 99%

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Simulation and flow physics of a shocked and reshocked high-energy-density mixing layer

et al. 2021

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Section: Introductionmentioning

confidence: 99%

“…Recently, Desjardins et al. (2019) presented a new experimental program to investigate mixing after three or more shocks.…”

Section: Introductionmentioning

confidence: 99%

Simulation and flow physics of a shocked and reshocked high-energy-density mixing layer

et al. 2021

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“…The ICF capsule consists of multiple material layers (Terry, Perkins & Sepke 2012;Montgomery et al 2018) and thus freeze-out of perturbation growth for fluid layers is significant. For a finite-thickness fluid layer, the growth of perturbations on one interface can affect that of the other, which causes the well-known phenomenon of interface coupling or feedthrough (Mikaelian 1983;Jacobs et al 1995;Desjardins et al 2019). If a reasonable condition is satisfied, the coupling effect induced by the first interface can freeze the growth of perturbations on the second interface, and vice versa.…”

Section: Introductionmentioning

confidence: 99%

“…1995; Desjardins et al. 2019). If a reasonable condition is satisfied, the coupling effect induced by the first interface can freeze the growth of perturbations on the second interface, and vice versa .…”

Section: Introductionmentioning

confidence: 99%

Freeze-out of perturbation growth for shocked heavy fluid layers by eliminating reverberating waves

Cong,

Guo,

Zhou

et al. 2024

J. Fluid Mech.

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The shock wave accelerating a heavy fluid layer can induce reverberating waves that continuously interact with the first and second interfaces. In order to manipulate the perturbation growths at fluid-layer interfaces, we present a theoretical framework to eliminate the reverberating waves. A model is established to predict the individual freeze-out (i.e. stagnation of perturbation growth) for the first and second interfaces under specific flow conditions determined based on the shock dynamics theory. The theoretical model quantifies the controllable parameters required for freeze-out, including the initial amplitudes of the first and second interfaces, the interface coupling strength and the maximum initial layer thickness preventing the second interface's phase reversal. The effectiveness of the model in predicting individual freeze-out for the first and second interfaces is validated numerically over a wide range of initial conditions. The upper and lower limits of initial amplitudes for the freeze-out of the whole fluid-layer width growth are further predicted. Within this amplitude range, a slightly higher initial amplitude for the second interface is specified, effectively arresting the growth of the entire fluid-layer width before the phase reversal of the second interface.

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“…In the ICF, the disturbance at the hotspot-fuel interface originates from its initial perturbation, the feedthrough of the perturbation on the ablation surface and the driven inhomogeneity (Hsing & Hoffman 1997;Weir, Chandler & Goodwin 1998;Shigemori et al 2002;Regan et al 2004;Haan et al 2011;Simakov et al 2014;Knapp et al 2017;Desjardins et al 2019). Milovich et al (2004) showed that the feedthrough of the ablation surface leads to a significant decrease in the implosion efficiency of a double-shell ignition target.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic instabilities of two successive slow/fast interfaces induced by a weak shock

Luo

2023

J. Fluid Mech.

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Shock-induced instability developments of two successive interfaces have attracted much attention, but remain a difficult problem to solve. The feedthrough and reverberating waves between two successive interfaces significantly influence the hydrodynamic instabilities of the two interfaces. The evolutions of two successive slow/fast interfaces driven by a weak shock wave are examined experimentally and numerically. First, a general one-dimensional theory is established to describe the movements of the two interfaces by studying the rarefaction waves reflected between the two interfaces. Second, an analytical, linear model is established by considering the arbitrary wavenumber and phase combinations and compressibility to quantify the feedthrough effect on the Richtmyer–Meshkov instability (RMI) of two successive slow/fast interfaces. The feedthrough significantly influences the RMI of the two interfaces, and even leads to abnormal RMI (i.e. phase reversal of a shocked slow/fast interface is inhibited) which is the first observational evidence of the abnormal RMI provided by the present study. Moreover, the stretching effect and short-time Rayleigh–Taylor instability or Rayleigh–Taylor stabilisation imposed by the rarefaction waves on the two interfaces are quantified considering the two interfaces’ phase reversal. The conditions and outcomes of the freeze-out and abnormal RMI caused by the feedthrough are summarised based on the theoretical model and numerical simulation. A specific requirement for the simultaneously freeze-out of the instability of the two interfaces is proposed, which can potentially be used in the applications to suppress the hydrodynamic instabilities.

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A platform for thin-layer Richtmyer-Meshkov at OMEGA and the NIF

Cited by 17 publications

References 66 publications

Simulation and flow physics of a shocked and reshocked high-energy-density mixing layer

Simulation and flow physics of a shocked and reshocked high-energy-density mixing layer

Freeze-out of perturbation growth for shocked heavy fluid layers by eliminating reverberating waves

Hydrodynamic instabilities of two successive slow/fast interfaces induced by a weak shock

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