Vid Agrež (Author), Žiga Lokar (Author), Rok Petkovšek (Author)

Abstract

The laser- induced cavitation bubble, which collapses near a rigid boundary with a hole on a microscale is investigated for liquid pumping applications. The generated bubble and the hole have a comparable size on a scale of 100 μm. The dynamics of the process are visually tracked near the hole and through the hole. This is made possible by the translucent 3D-printed boundary. The main measurable quantities are the bubble oscillation times and the bubble movement. For the latter, we show that it follows the power law of the Kelvin impulse for the rigid boundary without a hole for small standoff distances up to the moment when the bubble touches the edge of the hole. Further, it was found that the bubble standoff distance has a negligible influence on the first oscillation time, while it increases by almost a factor of two for the second oscillation. During the second oscillation, the bubble enters the hole and displaces all the liquid in the direction of bubble propagation. This indicates a second pumping driver beside the jet produced during the collapse of the primary bubble.

Keywords

laser induced cavitation;micro pumping;rigid boundary;bubble dynamics;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 532.528
COBISS: 200584195 Link will open in a new window
ISSN: 0030-3992
Views: 78
Downloads: 6
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Other data

Secondary language: Slovenian
Secondary keywords: lasersko povzročena kavitacija;mikro črpanje;trdna meja;dinamika mehurčka;
Type (COBISS): Article
Pages: str. 1-9
Issue: ǂVol. ǂ177, [article no.] 111235
Chronology: Oct. 2024
DOI: 10.1016/j.optlastec.2024.111235
ID: 24512123