Shaping and controlled fragmentation of liquid metal droplets through cavitation

Shaping and controlled fragmentation of liquid metal droplets through cavitation

Targeting micrometer sized metal droplets with near-infrared sub-picosecond laser pulses generates intense stress-confined acoustic waves within the droplet. Spherical focusing amplifies their pressures. The rarefaction wave nucleates cavitation at the center of the droplet, which explosively expand...

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Bibliographic Details
Main Authors: Krivokorytov, M. S., Lakatosh, B. V., Vinokhodov, A. Yu., Sidelnikov, Yu. V., Kompanets, V. O., Krivtsun, V. M., Koshelev, K. N., Medvedev, V. V., Zeng, Qingyun, Ohl, Claus Dieter
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2018
Subjects:
High-speed Jetting
Cavitation
Online Access:https://hdl.handle.net/10356/87505
http://hdl.handle.net/10220/45426
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Institution: Nanyang Technological University
Language: English
Description
Summary:Targeting micrometer sized metal droplets with near-infrared sub-picosecond laser pulses generates intense stress-confined acoustic waves within the droplet. Spherical focusing amplifies their pressures. The rarefaction wave nucleates cavitation at the center of the droplet, which explosively expands with a repeatable fragmentation scenario resulting into high-speed jetting. We predict the number of jets as a function of the laser energy by coupling the cavitation bubble dynamics with Rayleigh-Taylor instabilities. This provides a path to control cavitation and droplet shaping of liquid metals in particular for their use as targets in extreme-UV light sources.

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