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Laser-induced micro-jetting from armored droplets

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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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Authors and Affiliations

  1. Department of Chemical Engineering, Texas Tech University, Lubbock, TX, 79409, USA

    J. O. Marston

  2. Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia

    S. T. Thoroddsen

Authors
  1. J. O. Marston
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  2. S. T. Thoroddsen
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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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  • DOI: https://doi.org/10.1007/s00348-015-2007-6

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