Drop fragmentation by laser-pulse impact

被引:37
|
作者
Klein, Alexander L. [1 ,2 ]
Kurilovich, Dmitry [3 ,4 ,5 ]
Lhuissier, Henri [6 ]
Versolato, Oscar O. [3 ]
Lohse, Detlef [1 ,2 ]
Villermaux, Emmanuel [7 ,8 ]
Gelderblom, Hanneke [1 ,2 ,9 ]
机构
[1] Univ Twente, Phys Fluids Grp, Max Planck Ctr Twente Complex Fluid Dynam, JM Burgers Ctr, POB 217, NL-7500 AE Enschede, Netherlands
[2] Univ Twente, MESA Ctr Nanotechnol, Dept Sci & Technol, POB 217, NL-7500 AE Enschede, Netherlands
[3] Adv Res Ctr Nanolithog ARCNL, Sci Pk 106, NL-1098 XG Amsterdam, Netherlands
[4] Vrije Univ, Dept Phys & Astron, De Boelelaan 1081, NL-1081 HV Amsterdam, Netherlands
[5] Vrije Univ, LaserLaB, De Boelelaan 1081, NL-1081 HV Amsterdam, Netherlands
[6] Aix Marseille Univ, CNRS, IUSTI, F-13453 Marseille 13, France
[7] Aix Marseille Univ, CNRS, Cent Marseille, IRPHE, F-13384 Marseille 13, France
[8] Inst Univ France, F-75005 Paris, France
[9] Eindhoven Univ Technol, Dept Appl Phys, Den Dolech 2, NL-5600 MB Eindhoven, Netherlands
关键词
breakup; coalescence; SURFACE; DEFORMATION; THICKNESS; ABLATION; SHEET;
D O I
10.1017/jfm.2020.197
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
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.
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页数:37
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