An Imcompressible Rayleigh-Taylor Problem in KULL

Ulitsky, M

Lawrence Livermore National Laboratory

关键词: 42 Engineering;    Rayleigh-Taylor Instability;    Incompressible Flow;    Calculation Methods;   

DOI  :  10.2172/877785
RP-ID  :  UCRL-TR-215627
RP-ID  :  W-7405-ENG-48
RP-ID  :  877785

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来源: UNT Digital Library

【 摘 要 】

The goal of the EZturb mix model in KULL is to predict the turbulent mixing process as it evolves from Rayleigh-Taylor, Richtmyer-Meshkov, or Kelvin-Helmholtz instabilities. In this report we focus on a simple example of the Rayleigh-Taylor instability (which occurs when a heavy fluid lies above a light fluid, and we perturb the interface separating them). It is well known that the late time asymptotic, fully self-similar form for the growth of the mixing zone scales quadratically with time.