Nonlinear bubble competition of the multimode ablative Rayleigh–Taylor instability and applications to inertial confinement fusion
Abstract
The self-similar nonlinear evolution of the multimode ablative Rayleigh-Taylor instability (RTI) and the ablation-generated vorticity effect are studied for a range of initial conditions. We show that, unlike classical RTI, the nonlinear multimode bubble-front evolution remains in the bubble competition regime due to ablation-generated vorticity which accelerates the bubbles, thereby preventing a transition into the bubble-merger regime. We develop an analytical bubble competition model to describe the linear and nonlinear stages of ablative RTI. We show that vorticity inside the multimode bubbles is most significant at small scales with large initial perturbation. Since these small scales persist in the bubble competition regime, the self-similar growth coefficient αb can be enhanced by up to 30% relative to ablative bubble competition without vorticity effects. We use the ablative bubble competition model to explain the hydrodynamic stability boundary observed in OMEGA low-adiabat implosion experiments.
- Authors:
-
[1];
[2];
[3];
[2]
- Univ. of Rochester, NY (United States); Inst. of Applied Physics and Computational Mathematics, Beijing (China)
- Univ. of Rochester, NY (United States)
- Univ. of Science and Technology of China, Hefei (China); Shanghai Jiao Tong Univ. (China)
- Publication Date:
- Research Org.:
- Univ. of Rochester, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); National Aeronautics and Space Administration (NASA); National Natural Science Foundation of China (NSFC); USDOE National Nuclear Security Administration (NNSA)
- Contributing Org.:
- Laboratory for Laser Energetics, University of Rochester
- OSTI Identifier:
- 1749944
- Alternate Identifier(s):
- OSTI ID: 1735770; OSTI ID: 1762157; OSTI ID: 1778861
- Report Number(s):
- 2020-94; 1609; 2562
Journal ID: ISSN 1070-664X; TRN: US2205446
- Grant/Contract Number:
- SC0014318; SC0020229; 80NSSC18K0772; SC0019329; 11975056; NA0003856; NA0003914; XDA25050400
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 27; Journal Issue: 12; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Hydrodynamics codes; Fluid dynamics; Hydrodynamics simulations; Fluid instabilities
Citation Formats
Zhang, Huasen, Betti, R., Yan, Rui, and Aluie, Hussein. Nonlinear bubble competition of the multimode ablative Rayleigh–Taylor instability and applications to inertial confinement fusion. United States: N. p., 2020.
Web. doi:10.1063/5.0023541.
Zhang, Huasen, Betti, R., Yan, Rui, & Aluie, Hussein. Nonlinear bubble competition of the multimode ablative Rayleigh–Taylor instability and applications to inertial confinement fusion. United States. https://doi.org/10.1063/5.0023541
Zhang, Huasen, Betti, R., Yan, Rui, and Aluie, Hussein. Wed .
"Nonlinear bubble competition of the multimode ablative Rayleigh–Taylor instability and applications to inertial confinement fusion". United States. https://doi.org/10.1063/5.0023541. https://www.osti.gov/servlets/purl/1749944.
@article{osti_1749944,
title = {Nonlinear bubble competition of the multimode ablative Rayleigh–Taylor instability and applications to inertial confinement fusion},
author = {Zhang, Huasen and Betti, R. and Yan, Rui and Aluie, Hussein},
abstractNote = {The self-similar nonlinear evolution of the multimode ablative Rayleigh-Taylor instability (RTI) and the ablation-generated vorticity effect are studied for a range of initial conditions. We show that, unlike classical RTI, the nonlinear multimode bubble-front evolution remains in the bubble competition regime due to ablation-generated vorticity which accelerates the bubbles, thereby preventing a transition into the bubble-merger regime. We develop an analytical bubble competition model to describe the linear and nonlinear stages of ablative RTI. We show that vorticity inside the multimode bubbles is most significant at small scales with large initial perturbation. Since these small scales persist in the bubble competition regime, the self-similar growth coefficient αb can be enhanced by up to 30% relative to ablative bubble competition without vorticity effects. We use the ablative bubble competition model to explain the hydrodynamic stability boundary observed in OMEGA low-adiabat implosion experiments.},
doi = {10.1063/5.0023541},
journal = {Physics of Plasmas},
number = 12,
volume = 27,
place = {United States},
year = {Wed Dec 09 00:00:00 EST 2020},
month = {Wed Dec 09 00:00:00 EST 2020}
}
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