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Laser-induced micro-jetting from armored droplets

Abstract

We present findings from an experimental study of laser-induced cavitation within a liquid drop coated with a granular material, commonly referred to as “armored droplets” or “liquid marbles.” The cavitation event follows the formation of plasma after a nanosecond laser pulse. Using ultra-high-speed imaging up to 320,610 fps, we investigate the extremely rapid dynamics following the cavitation, which manifests itself in the form of a plethora of micro-jets emanating simultaneously from the spaces between particles on the surface of the drop. These fine jets break up into droplets with a relatively narrow diameter range, on the order of 10 μm.

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Author information

Correspondence to J. O. Marston.

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Marston, J.O., Thoroddsen, S.T. Laser-induced micro-jetting from armored droplets. Exp Fluids 56, 140 (2015). https://doi.org/10.1007/s00348-015-2007-6

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Keywords

  • Laser Pulse
  • Cavitation
  • Cavitation Bubble
  • Laser Pulse Energy
  • Liquid Free Surface