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Title: Three-dimensional single-mode nonlinear ablative Rayleigh-Taylor instability

The nonlinear evolution of the single-mode ablative Rayleigh-Taylor instability is studied in three dimensions. As the mode wavelength approaches the cutoff of the linear spectrum (short-wavelength modes), it is found that the three-dimensional (3D) terminal bubble velocity greatly exceeds both the two-dimensional (2D) value and the classical 3D bubble velocity. Unlike in 2D, the 3D short-wavelength bubble velocity does not saturate. The growing 3D bubble acceleration is driven by the unbounded accumulation of vorticity inside the bubble. The vorticity is transferred by mass ablation from the Rayleigh-Taylor spikes to the ablated plasma filling the bubble volume.
Authors:
;  [1] ;  [2] ;  [1] ;  [2] ;  [2] ;  [3] ; ;  [4]
  1. Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627 (United States)
  2. (United States)
  3. E.T.S.I. Aeronáuticos, Universidad Politécnica de Madrid, Madrid 28040 (Spain)
  4. Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627 (United States)
Publication Date:
OSTI Identifier:
22493885
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 2; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ABLATION; ACCELERATION; BUBBLES; NONLINEAR PROBLEMS; PLASMA; RAYLEIGH-TAYLOR INSTABILITY; SPECTRA; THREE-DIMENSIONAL CALCULATIONS; THREE-DIMENSIONAL LATTICES; TWO-DIMENSIONAL CALCULATIONS; WAVELENGTHS