Large eddy simulation of Rayleigh-Taylor instability using the arbitrary Lagrangian-Eulerian method

Darlington, Rebecca Mattson

doi:10.2172/15013106

Title: Large eddy simulation of Rayleigh-Taylor instability using the arbitrary Lagrangian-Eulerian method

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Abstract

This research addresses the application of a large eddy simulation (LES) to Arbitrary Lagrangian Eulerian (ALE) simulations of Rayleigh-Taylor instability. First, ALE simulations of simplified Rayleigh-Taylor instability are studied. The advantages of ALE over Eulerian simulations are shown. Next, the behavior of the LES is examined in a more complicated ALE simulation of Rayleigh-Taylor instability. The effects of eddy viscosity and stochastic backscatter are examined. The LES is also coupled with ALE to increase grid resolution in areas where it is needed. Finally, the methods studied above are applied to two sets of experimental simulations. In these simulations, ALE allows the mesh to follow expanding experimental targets, while LES can be used to mimic the effect of unresolved instability modes.

Authors:

Darlington, Rebecca Mattson ^[1]

Univ. of California, Davis, CA (United States)

Publication Date:: Wed Dec 01 00:00:00 EST 1999

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 15013106

Report Number(s):: UCRL-LR-136160
TRN: US200604%%118

DOE Contract Number:: W-7405-ENG-48

Resource Type:: Thesis/Dissertation

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; INSTABILITY; LAGRANGIAN FUNCTION; RAYLEIGH-TAYLOR INSTABILITY; RESOLUTION; SIMULATION; TARGETS; VISCOSITY

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                    Darlington, Rebecca Mattson. Large eddy simulation of Rayleigh-Taylor instability using the arbitrary Lagrangian-Eulerian method.  United States: N. p., 1999. 
        Web.  doi:10.2172/15013106.

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                    Darlington, Rebecca Mattson. Large eddy simulation of Rayleigh-Taylor instability using the arbitrary Lagrangian-Eulerian method.  United States.  https://doi.org/10.2172/15013106

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                    Darlington, Rebecca Mattson. 1999.  
        "Large eddy simulation of Rayleigh-Taylor instability using the arbitrary Lagrangian-Eulerian method".  United States.  https://doi.org/10.2172/15013106.  https://www.osti.gov/servlets/purl/15013106.

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@article{osti_15013106,

  title        = {Large eddy simulation of Rayleigh-Taylor instability using the arbitrary Lagrangian-Eulerian method},

  author       = {Darlington, Rebecca Mattson},

  abstractNote = {This research addresses the application of a large eddy simulation (LES) to Arbitrary Lagrangian Eulerian (ALE) simulations of Rayleigh-Taylor instability. First, ALE simulations of simplified Rayleigh-Taylor instability are studied. The advantages of ALE over Eulerian simulations are shown. Next, the behavior of the LES is examined in a more complicated ALE simulation of Rayleigh-Taylor instability. The effects of eddy viscosity and stochastic backscatter are examined. The LES is also coupled with ALE to increase grid resolution in areas where it is needed. Finally, the methods studied above are applied to two sets of experimental simulations. In these simulations, ALE allows the mesh to follow expanding experimental targets, while LES can be used to mimic the effect of unresolved instability modes.},

  doi          = {10.2172/15013106},

  url          = {https://www.osti.gov/biblio/15013106},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Wed Dec 01 00:00:00 EST 1999},

  month        = {Wed Dec 01 00:00:00 EST 1999}

}

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