Moving and deforming a liquid drop by pulsed laser irradiation

ORAL

Abstract

The impact of a focused laser pulse onto a liquid drop can be so violent that the drop strongly deforms and eventually explodes. We studied the drop dynamics that results from this laser impact experimentally, in order to understand the time evolution of the drop and find the underlying driving mechanism. The high reproducibility of the dynamics allowed us to use stroboscopic illumination with short, ns exposure times. Combining this technique with high-speed imaging we captured key details of the laser impact and drop deformation. The laser impact ablates the front the drop while the remainder of the drop acquires a velocity of several m/s. The drop expands radially into a disk-like shape with a velocity of the same order of magnitude, before instabilities develop and the drop fragments. A parameter study of the time-resolved drop shape and velocity as a function of the laser energy is presented.

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Authors

  • Alexander L. Klein

    Physics of Fluids, Faculty of Science \& Technology, University of Twente, The Netherlands

  • Claas Willem Visser

    Physics of Fluids, Faculty of Science \& Technology, University of Twente, The Netherlands

  • Henri Lhuissier

    Matiere et Systemes Complexes, Universit\'e Paris Diderot, France, University of Paris, Universit\'e Paris Diderot

  • Emmanuel Villermaux

    Aix Marseille Universit\'e, CNRS, Centrale Marseille, IRPHE UMR 7342, 13384, Aix Marseille University, France, Aix-Marseille Universit\'e, IRPHE, France, IRPHE, Aix-Marseille Universit\'e, France, Aix Marseille Universit\'e, IRPHE, Marseille, France, IRPHE, Aix-Marseille Univ., CNRS, Ecole Centrale Marseille, IRPHE, Aix-Marseille Universit\'e, France

  • Chao Sun

    University of Twente, Physics of Fluids Group, Faculty of Science and Technology, University of Twente, 7500 AE Enschede, The Netherlands, Physics of Fluids, Faculty of Science \& Technology, University of Twente, The Netherlands

  • Detlef Lohse

    University of Twente, Physics of Fluids Group, Faculty of Science and Technology, University of Twente, 7500 AE Enschede, The Netherlands, PoF Univ. of Twente, Physics of Fluids, Mesa+ Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, Physics of Fluids, Faculty of Science \& Technology, University of Twente, The Netherlands, Physics of Fluids, University of Twente, Univ of Twente

  • Hanneke Gelderblom

    Physics of Fluids, Faculty of Science \& Technology, University of Twente, The Netherlands