Threedimensional singlemode nonlinear ablative RayleighTaylor instability
The nonlinear evolution of the singlemode ablative RayleighTaylor instability is studied in three dimensions. As the mode wavelength approaches the cutoff of the linear spectrum (shortwavelength modes), it is found that the threedimensional (3D) terminal bubble velocity greatly exceeds both the twodimensional (2D) value and the classical 3D bubble velocity. Unlike in 2D, the 3D shortwavelength bubble velocity does not saturate. The growing 3D bubble acceleration is driven by the unbounded accumulation of vorticity inside the bubble. As a result, the vorticity is transferred by mass ablation from the RayleighTaylor spikes to the ablated plasma filling the bubble volume.
 Authors:

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 Univ. of Rochester, Rochester, NY (United States)
 Univ. Politecnica de Madrid, Madrid (Spain)
 Publication Date:
 Grant/Contract Number:
 NA0001944; FG0204ER54789; SC0014318; DEFG02 04ER54789
 Type:
 Accepted Manuscript
 Journal Name:
 Physics of Plasmas
 Additional Journal Information:
 Journal Volume: 23; Journal Issue: 2; Journal ID: ISSN 1070664X
 Publisher:
 American Institute of Physics (AIP)
 Research Org:
 Univ. of Rochester, Rochester, NY (United States)
 Sponsoring Org:
 USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC24); USDOE National Nuclear Security Administration (NNSA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; bubble dynamics; Rayleigh Taylor instabilities; rotating flows; laser ablation; kinematics
 OSTI Identifier:
 1239798
 Alternate Identifier(s):
 OSTI ID: 1236654
Yan, R., Betti, R., Sanz, J., Aluie, H., Liu, B., and Frank, A.. Threedimensional singlemode nonlinear ablative RayleighTaylor instability. United States: N. p.,
Web. doi:10.1063/1.4940917.
Yan, R., Betti, R., Sanz, J., Aluie, H., Liu, B., & Frank, A.. Threedimensional singlemode nonlinear ablative RayleighTaylor instability. United States. doi:10.1063/1.4940917.
Yan, R., Betti, R., Sanz, J., Aluie, H., Liu, B., and Frank, A.. 2016.
"Threedimensional singlemode nonlinear ablative RayleighTaylor instability". United States.
doi:10.1063/1.4940917. https://www.osti.gov/servlets/purl/1239798.
@article{osti_1239798,
title = {Threedimensional singlemode nonlinear ablative RayleighTaylor instability},
author = {Yan, R. and Betti, R. and Sanz, J. and Aluie, H. and Liu, B. and Frank, A.},
abstractNote = {The nonlinear evolution of the singlemode ablative RayleighTaylor instability is studied in three dimensions. As the mode wavelength approaches the cutoff of the linear spectrum (shortwavelength modes), it is found that the threedimensional (3D) terminal bubble velocity greatly exceeds both the twodimensional (2D) value and the classical 3D bubble velocity. Unlike in 2D, the 3D shortwavelength bubble velocity does not saturate. The growing 3D bubble acceleration is driven by the unbounded accumulation of vorticity inside the bubble. As a result, the vorticity is transferred by mass ablation from the RayleighTaylor spikes to the ablated plasma filling the bubble volume.},
doi = {10.1063/1.4940917},
journal = {Physics of Plasmas},
number = 2,
volume = 23,
place = {United States},
year = {2016},
month = {2}
}