Vid Agrež (Author), Jaka Mur (Author), Jaka Petelin (Author), Rok Petkovšek (Author)

Abstract

The nucleation and growth of cavitation bubbles few micrometers in size in water generated by a 60 ps 515 nm fiber laser is observed and visualized near nucleation threshold. The study is performed by monitoring the plasma size, the cavitation bubble size and the emitted shock waves. The latter two aspects are supported by the Gilmore model using a Noble-Abel-stiffened-gas (NASG) equations of state. For the first time, two types of cavitation events are identified and visualized that exhibit a difference of more than two orders of magnitude in the excitation energy converted to mechanical effects with minimal change in excitation laser pulse energy. The result is localized cavitation and reduced mechanical stress on water-based media with potentially positive implications for laser treatments of biological tissue.

Keywords

micro cavitation;bubble nucleation;dual threshold;shockwaves;laser induced breakdown;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 532.528
COBISS: 132471299 Link will open in a new window
ISSN: 1350-4177
Views: 292
Downloads: 139
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Other data

Secondary language: Slovenian
Secondary keywords: mikro kavitacija;dvojni prag;udarni valovi;lasersko povzročen preboj;
Type (COBISS): Article
Pages: str. 1-8
Issue: ǂVol. ǂ92
Chronology: Jan. 2023
DOI: 10.1016/j.ultsonch.2022.106243
ID: 17332122