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Chinese Journal of High Pressure Physics  > 2013  >  27(1): 90-98.
ZOU Li-Yong, LIU Cang-Li, PANG Yong, LUO Xi-Sheng, BAI Jin-Song, YANG Ji-Ming. A Numerical Study on Interface Evolution and Jet Development of a Shocked SF6 Gas Bubble[J]. Chinese Journal of High Pressure Physics, 2013, 27(1): 90-98. doi: 10.11858/gywlxb.2013.01.013
Citation: ZOU Li-Yong, LIU Cang-Li, PANG Yong, LUO Xi-Sheng, BAI Jin-Song, YANG Ji-Ming. A Numerical Study on Interface Evolution and Jet Development of a Shocked SF6 Gas Bubble[J]. Chinese Journal of High Pressure Physics, 2013, 27(1): 90-98. doi: 10.11858/gywlxb.2013.01.013
shu

A Numerical Study on Interface Evolution and Jet Development of a Shocked SF6 Gas Bubble

doi: 10.11858/gywlxb.2013.01.013
  • 1.

    National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, Mianyang 621900, China;

  • 2.

    Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China

  • Received Date: 15 Aug 2011
  • Rev Recd Date: 14 Nov 2011
  • Issue Publish Date: 15 Feb 2013
    Abstract
  • The Richtmyer-Meshkov instability occurring on a heavy gas (SF6) bubble surrounded by N2 is numerically investigated in the present work. The interface evolution, shock focusing and jet development are emphasized. Numerical schlieren images and distributions of pressure, density and vorticity are exhibited for an incident shock wave of Mach number 1.23. The jet velocity, circulation and baroclinic torque versus time as well as peak values of pressure and density in the flow field are quantitatively analyzed. The results indicate that SF6 gas bubble accelerated by a planar shock wave has a strong cumulative energy effect so that it produces nearly ideal shock focusing and point source explosion phenomenon near the downstream pole within the bubble interface, which directly results in a secondary wave pattern and a slender jet moving in the streamwise direction. Compared with the secondary wave pattern, the incident shock wave brings on more intense baroclinic torque and vorticity.

     

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