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Volume 33 Issue 1
Jan 2019
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Chinese Journal of High Pressure Physics  > 2019  >  33(1): 012302.
WANG Tao, WANG Bing, LIN Jianyu, BAI Jingsong, LI Ping, ZHONG Min, TAO Gang. Computational Analysis of RM Instability with Inverse Chevron Interface[J]. Chinese Journal of High Pressure Physics, 2019, 33(1): 012302. doi: 10.11858/gywlxb.20180575
Citation: WANG Tao, WANG Bing, LIN Jianyu, BAI Jingsong, LI Ping, ZHONG Min, TAO Gang. Computational Analysis of RM Instability with Inverse Chevron Interface[J]. Chinese Journal of High Pressure Physics, 2019, 33(1): 012302. doi: 10.11858/gywlxb.20180575
shu

Computational Analysis of RM Instability with Inverse Chevron Interface

doi: 10.11858/gywlxb.20180575
  • 1.

    School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

  • 2.

    Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, China

  • Received Date: 05 Jun 2018
  • Rev Recd Date: 28 Jun 2018
    Abstract
  • By using our in-house large-eddy simulation code, the MVFT (multi-viscous-flow and turbulence), we simulated the Richtmyer-Meshkov (RM) instability and turbulent mixed with the inverse chevron interface on a 3D large scale on the HPC (high performance computing) platform. The results revealed the propagations of the decomposed shock wave, the rarefaction wave, the compression wave and the interactions between the waves and the perturbed interface. Each impact of on the wave on the interface accelerates the evolution of the turbulent mixing zone and the materials’ mixing. The inverse chevron interface inverts its phase after the first transmitted shock wave in the SF6 zone hits it, then two wall bubbles and a centerline spike with large scale develop gradually. The averaged geometry feature and the envelop of turbulent mixing zone are determined by the large-scale wall bubbles and the centerline spike and are independent of the mesh. But with the higher grid resolution, more subtle small scale turbulent eddies and intense turbulent fluctuations are captured, characterizing the turbulent mixing zone as possessing a complex structure.

     

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