Nonlinear evolution of the Rayleigh-Taylor and Richtmyer-Meshkov instabilities

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Scaled experiments on the nonlinear evolution of the Rayleigh- Taylor (RT) and Richtmyer-Meshkov (RM) instabilities are described under a variety, of conditions that occur in nature. At high Reynolds number, the mixing layer grows self-similarly - {alpha}{sub i}Agt{sup 2} for a constant acceleration (g), and as a power law t{sup {theta}{sub i}} for impulsive accelerations U{delta}(t) at low and high Mach numbers. The growth coefficients {alpha}{sub i} and {theta}{sub i} exponents are measured over a comprehensive range of Atwood numbers A. The RT instability is also investigated with Non- Newtonian materials which are independently characterized. A critical wavelength and amplitude ... continued below

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Dimonte, G November 1, 1998.

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Scaled experiments on the nonlinear evolution of the Rayleigh- Taylor (RT) and Richtmyer-Meshkov (RM) instabilities are described under a variety, of conditions that occur in nature. At high Reynolds number, the mixing layer grows self-similarly - {alpha}{sub i}Agt{sup 2} for a constant acceleration (g), and as a power law t{sup {theta}{sub i}} for impulsive accelerations U{delta}(t) at low and high Mach numbers. The growth coefficients {alpha}{sub i} and {theta}{sub i} exponents are measured over a comprehensive range of Atwood numbers A. The RT instability is also investigated with Non- Newtonian materials which are independently characterized. A critical wavelength and amplitude for instability is observed associated with the shear modulus and tensile yield of the material. The results are applicable from supernova explosions to geophysical flows subject to these hydrodynamic instabilities.

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  • American Physical Society 40th Annual Meeting of the Division of Plasma Physics, New Orlean, LA, November 16-20, 1998

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  • Other: DE00005773
  • Report No.: UCRL-JC-132439
  • Grant Number: W-7405-Eng-48
  • Office of Scientific & Technical Information Report Number: 5773
  • Archival Resource Key: ark:/67531/metadc692706

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  • November 1, 1998

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  • Aug. 14, 2015, 8:43 a.m.

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  • May 6, 2016, 10:56 p.m.

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Dimonte, G. Nonlinear evolution of the Rayleigh-Taylor and Richtmyer-Meshkov instabilities, article, November 1, 1998; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc692706/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.