Bell-Plesset effects in Rayleigh-Taylor instability of finite-thickness spherical and cylindrical shells
Abstract
Bell-Plesset (BP) effects account for the influence of global convergence or divergence of the fluid flow on the evolution of the interfacial perturbations embedded in the flow. The development of the Rayleigh-Taylor instability in radiation-driven spherical capsules and magnetically-driven cylindrical liners necessarily includes a significant contribution from BP effects due to the time dependence of the radius, velocity, and acceleration of the unstable surfaces or interfaces. An analytical model is presented that, for an ideal incompressible fluid and small perturbation amplitudes, exactly evaluates the BP effects in finite-thickness shells through acceleration and deceleration phases. The time-dependent dispersion equations determining the “instantaneous growth rate” are derived. It is demonstrated that by integrating this approximate growth rate over time, one can accurately evaluate the number of perturbation e-foldings during the inward acceleration phase of the implosion. As a result, in the limit of small shell thickness, exact thin-shell perturbationequations and approximate thin-shell dispersion equations are obtained, generalizing the earlier results [E. G. Harris, Phys. Fluids 5, 1057 (1962); E. Ott, Phys. Rev. Lett. 29, 1429 (1972); A. B. Bud'ko et al., Phys. Fluids B 2, 1159 (1990)].
- Authors:
-
- Naval Research Lab., Washington, DC (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1239149
- Alternate Identifier(s):
- OSTI ID: 1234031
- Report Number(s):
- SAND-2015-8754J
Journal ID: ISSN 1070-664X; PHPAEN; 615227
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 22; 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; magnetic fields; Rayleigh Taylor instabilities; eigenvalues; boundary value problems; kinematics
Citation Formats
Velikovich, A. L., and Schmit, P. F. Bell-Plesset effects in Rayleigh-Taylor instability of finite-thickness spherical and cylindrical shells. United States: N. p., 2015.
Web. doi:10.1063/1.4938272.
Velikovich, A. L., & Schmit, P. F. Bell-Plesset effects in Rayleigh-Taylor instability of finite-thickness spherical and cylindrical shells. United States. https://doi.org/10.1063/1.4938272
Velikovich, A. L., and Schmit, P. F. 2015.
"Bell-Plesset effects in Rayleigh-Taylor instability of finite-thickness spherical and cylindrical shells". United States. https://doi.org/10.1063/1.4938272. https://www.osti.gov/servlets/purl/1239149.
@article{osti_1239149,
title = {Bell-Plesset effects in Rayleigh-Taylor instability of finite-thickness spherical and cylindrical shells},
author = {Velikovich, A. L. and Schmit, P. F.},
abstractNote = {Bell-Plesset (BP) effects account for the influence of global convergence or divergence of the fluid flow on the evolution of the interfacial perturbations embedded in the flow. The development of the Rayleigh-Taylor instability in radiation-driven spherical capsules and magnetically-driven cylindrical liners necessarily includes a significant contribution from BP effects due to the time dependence of the radius, velocity, and acceleration of the unstable surfaces or interfaces. An analytical model is presented that, for an ideal incompressible fluid and small perturbation amplitudes, exactly evaluates the BP effects in finite-thickness shells through acceleration and deceleration phases. The time-dependent dispersion equations determining the “instantaneous growth rate” are derived. It is demonstrated that by integrating this approximate growth rate over time, one can accurately evaluate the number of perturbation e-foldings during the inward acceleration phase of the implosion. As a result, in the limit of small shell thickness, exact thin-shell perturbationequations and approximate thin-shell dispersion equations are obtained, generalizing the earlier results [E. G. Harris, Phys. Fluids 5, 1057 (1962); E. Ott, Phys. Rev. Lett. 29, 1429 (1972); A. B. Bud'ko et al., Phys. Fluids B 2, 1159 (1990)].},
doi = {10.1063/1.4938272},
url = {https://www.osti.gov/biblio/1239149},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 12,
volume = 22,
place = {United States},
year = {Mon Dec 28 00:00:00 EST 2015},
month = {Mon Dec 28 00:00:00 EST 2015}
}
Web of Science
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Works referencing / citing this record:
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