Shock wave excited liquid micro-jets

ORAL

Abstract

The meniscus of the gas-water interface in a thin hydrophilic capillary of 1mm and less has some similarities to a ``shaped charge'' used to penetrated armored vehicles. In this presentation we show high-speed recordings of the interface dynamics after the reflection from a shock wave: the interface flattens and shapes into a microscopic needle-like jet, which accelerates to velocities of 100m/s and more. Further the dependencies of the pressure amplitude, capillary diameter, and interface curvature on the jet velocity are presented.

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Authors

  • Claus-Dieter Ohl

    • Physics of Fluids, University of Twente, Postbus 217, 7500 AE Enschede

  • Daan Martens

  • Aaldert Zijlstra

  • Michel Versluis (1)

  • Detlef Lohse

    • University of Twente, The Netherlands
    • Fluid Physics, University of Twente, The Netherlands
    • Physics of Fluids, University of Twente, Postbus 217, 7500 AE Enschede, The Netherlands
    • University of Twente (The Netherlands)
    • University of Twente

  • Nico de Jong (1, 2)

    • Experimental Echocardiography, ErasmusMC, Postbus 1738, 3000 DR Rotterdam, The Netherlands