The Benjamin Shock Tube Problem in KULL

Ulitsky, M

Lawrence Livermore National Laboratory

关键词: Air;    Shock Tubes;    71 Classical And Quantumm Mechanics, General Physics;    Instability;   

DOI  :  10.2172/919214
RP-ID  :  UCRL-TR-214888
RP-ID  :  W-7405-ENG-48
RP-ID  :  919214

美国|英语

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 Richtmyer-Meshkov instability (which occurs when a shock hits an interface between fluids of different densities) without the complication of reshock. The experiment by Benjamin et al. involving a Mach 1.21 incident shock striking an air / SF6 interface, is a good one to model and understand before moving onto shock tubes that follow the growth of the turbulent mixing zone from first shock through well after reshock.