Near threshold nucleation and growth of cavitation bubbles generated with a picosecond laser

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

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.

• Language: English
• Keywords: micro cavitation, bubble nucleation, dual threshold, shockwaves, laser induced breakdown
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2023
• Number of pages: 8 str.
• Numbering: Vol. 92, art. 106243
• PID: 20.500.12556/RUL-142960
• UDC: 532.528
• ISSN on article: 1350-4177
• DOI: 10.1016/j.ultsonch.2022.106243
• COBISS.SI-ID: 132471299
• Publication date in RUL: 06.12.2022

Record is a part of a journal

• Title: Ultrasonics sonochemistry
• Shortened title: Ultrason. sonochem.
• Publisher: Elsevier
• ISSN: 1350-4177
• COBISS.SI-ID: 707668

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Secondary language

• Language: Slovenian
• Keywords: mikrokavitacija, dvojni prag, udarni valovi, lasersko povzročen preboj