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Shock Waves

, Volume 10, Issue 4, pp 265–276 | Cite as

Shock-induced collapse of a cylindrical air cavity in water: a Free-Lagrange simulation

  • G.J. Ball
  • B.P. Howell
  • T.G. Leighton
  • M.J. Schofield
Original article

Abstract.

A Free-Lagrange CFD code is used to simulate the collapse of a cylindrical air cavity in water by a 1.9 GPa incident shock. The Lagrangian treatment allows the air/water interface to be tracked throughout the interaction. The incident shock is partially transmitted into the cavity, within which it experiences multiple reflections. The upstream cavity wall involutes to form a high-speed jet which, on impact with the far cavity wall, produces an intense blast wave. Heating of the gas within the cavity is highly non-isentropic, and is dominated by shock heating. The predicted final gas temperature is of order 12000 K, although the modelling assumptions used here lead to over-prediction of temperature during the later stages of collapse.

Key words: Free-Lagrange method, Bubble collapse, Detonation initiation, Cavitation, Jetting, Shock heating 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • G.J. Ball
    • 1
  • B.P. Howell
    • 1
  • T.G. Leighton
    • 2
  • M.J. Schofield
    • 1
  1. 1.School of Engineering Sciences, University of Southampton, SO17 1BJ, UKGB
  2. 2.Institute of Sound and Vibration Research, University of Southampton, SO17 1BJ, UKGB

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