68th Annual Meeting of the APS Division of Fluid Dynamics (November 22, 2015 — November 24, 2015)

V0029: Instabilities and fragmentation of drops in 3D

  • Silvestre Roberto Gonzalez-Avila, Nanyang Technological University
  • Pjotr Kerssens, University of Twente
  • Julien Rapet, Nanyang Technological University
  • Claus-Dieter Ohl, Nanyang Technological University
DOI: https://doi.org/10.1103/APS.DFD.2015.GFM.V0029

Breaking waves and volcanic eruptions are accompanied by the fragmentation of droplets first into smaller daughter droplets and then down to mist. Also in spray irrigation, ink-jet printing and to optimize internal combustion engines the very same fluid mechanics is exploited to control the size and distributions of the fragments. As the dynamics is intrinsically fast, complex, and 3-dimensional we have a fresh look and record the fragmentation process with high-speed 3D cinematography. Besides presenting the aesthetics of the fragmentation process in 3D, we compare the dynamics of the droplets with simulations and reveal distinct regimes, e.g. the jellyfish and the jetting regime. Our findings has specific relevance for the laser shaping of droplets in upcoming extreme UV light sources.

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