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