@article{6a4d1ef5e176413ea866217aa27532b8,
title = "Cavitation induced by pulsed and continuous-wave fiber lasers in confinement",
abstract = "Bubbles generated with lasers in liquids under confinement have been investigated for their potential use as the driving mechanism for liquid micro-jets in various microfluidic devices, such as needle-free jet injectors. Here, we report on the study of bubble formation by a continuous-wave (CW) and a pulsed laser inside an open-ended microfluidic capillary. This results in a direct comparison between bubbles generated by laser sources emitting light in different time scales (ms and ns). The bubble kinetics represents an important parameter because it determines the available kinetic energy for a subsequent liquid jet. We show that the bubble growth rate increases linearly with the delivered energy for both the CW and the pulsed laser. Experiments show that at equal absorption coefficient, the bubble growth for both lasers is similar, which indicates that they can be used interchangeably for jet generation purposes. However, bubbles generated by a CW laser require more optical energy, which is due to heat dissipation. Furthermore, the bubbles generated by the CW laser show a slightly larger variation in size and growth rate for identical initial conditions, which we attribute to the stochastic nature of thermocavitation.",
keywords = "Cavitation, CW laser, Jet injection, Microfluidic confinement, Pulsed laser, Thermocavitation, Vapor bubble, UT-Hybrid-D",
author = "Schoppink, {Jelle J.} and Jan Krizek and Christophe Moser and {Fernandez Rivas}, David",
note = "Funding Information: J.J.S. would like to thank dr. Dani{\"e}l J{\'a}uregui-V{\'a}zquez, dr. Jose Alvarez Chavez and Frans Segerink for their help with the optical set-up of the CW laser and K. Mohan for her help with surface tension and viscosity measurements. J.J.S and D.F.R. acknowledge the funding from the European Research Council (ERC) under the European Union's Horizon 2020 Research and Innovation Programme (Grant Agreement No. 851630), and NWO Take-off phase 1 program funded by the Ministry of Education, Culture and Science of the Government of the Netherlands (No. 18844). J.K. and Ch.M. acknowledge the Innosuisse BRIDGE Proof of Concept grant funding. The authors are thankful for the insightful discussions with Dr. M. A. Quetzeri Santiago, D.L. van der Ven, K. Mohan and D. de Boer. Funding Information: J.J.S. would like to thank dr. Dani{\"e}l J{\'a}uregui-V{\'a}zquez, dr. Jose Alvarez Chavez and Frans Segerink for their help with the optical set-up of the CW laser and K. Mohan for her help with surface tension and viscosity measurements. J.J.S and D.F.R. acknowledge the funding from the European Research Council (ERC) under the European Union{\textquoteright}s Horizon 2020 Research and Innovation Programme (Grant Agreement No. 851630 ), and NWO Take-off phase 1 program funded by the Ministry of Education, Culture and Science of the Government of the Netherlands (No. 18844 ). J.K. and Ch.M. acknowledge the Innosuisse BRIDGE Proof of Concept grant funding. The authors are thankful for the insightful discussions with Dr. M. A. Quetzeri Santiago, D.L. van der Ven, K. Mohan and D. de Boer. Publisher Copyright: {\textcopyright} 2023 The Author(s)",
year = "2023",
month = aug,
day = "1",
doi = "10.1016/j.expthermflusci.2023.110926",
language = "English",
volume = "146",
journal = "Experimental thermal and fluid science",
issn = "0894-1777",
publisher = "Elsevier Inc.",
}