Hendrik Reese (Author), Claus-Dieter Ohl (Author), Juan Manuel Rosselló (Author)

Abstract

We study the physical mechanisms behind the ejection of a liquid jet from a curved free surface, specifically a free-falling water drop. The jet is produced after a spherical shock wave emitted from a micro-explosion created by a focused laser pulse is refocused on the opposite side of its source. The analysis of high-speed videos of the liquid jet formation revealed that it originates from a larger, prolate cavitation bubble created by the strong tension produced after the reflection of the original wave on the air–liquid interface. The shock wave propagation and jet formation are modeled separately with finite volume simulations in OpenFOAM. Initially we study the pressure evolution inside the drop by comparing the numerical simulations with the distribution of bubbles nucleated after the passage of the negative pressure wave. The jet formation dynamics is explained by comparing the experiments with numerical results. The jet velocity is higher if the laser focus is closer to the drop surface.

Keywords

udarni valovi;računalniška dinamika tekočin;kavitacija;shock waves;cavitation;computational fluid dynamics;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 532.528
COBISS: 194651651 Link will open in a new window
ISSN: 1879-3533
Views: 14
Downloads: 1
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Other data

Secondary language: Slovenian
Secondary keywords: udarni valovi;računalniška dinamika tekočin;kavitacija;
Type (COBISS): Article
Pages: str. 1-5
Issue: ǂVol. ǂ175, [article no.] 104822
Chronology: May 2024
DOI: 10.1016/j.ijmultiphaseflow.2024.104822
ID: 23628272