Drop fragmentation by laser-pulse impact

Alexander L. Klein, Dmitry Kurilovich, Henri Lhuissier, Oscar O. Versolato, Detlef Lohse, Emmanuel Villermaux, Hanneke Gelderblom*

*Corresponding author for this work

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Abstract

We study the fragmentation of a liquid drop that is hit by a laser pulse. The drop expands into a thin sheet that breaks by the radial expulsion of ligaments from its rim and the nucleation and growth of holes on the sheet. By combining experimental data from two liquid systems with vastly different time and length scales, we show how the early-time laser-matter interaction affects the late-time fragmentation. We identify two Rayleigh-Taylor instabilities of different origins as the prime cause of the fragmentation and derive scaling laws for the characteristic breakup time and wavenumber. The final web of ligaments results from a subtle interplay between these instabilities and deterministic modulations of the local sheet thickness, which originate from the drop deformation dynamics and spatial variations in the laser-beam profile.

Original languageEnglish
Article numberA7
JournalJournal of fluid mechanics
Volume893
DOIs
Publication statusPublished - 25 Jun 2020

Keywords

  • UT-Hybrid-D
  • Breakup/coalescence

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    Klein, A. L., Kurilovich, D., Lhuissier, H., Versolato, O. O., Lohse, D., Villermaux, E., & Gelderblom, H. (2020). Drop fragmentation by laser-pulse impact. Journal of fluid mechanics, 893, [A7]. https://doi.org/10.1017/jfm.2020.197