Illuminating a water solution with a focused continuous wave laser produces a strong local heating of the liquid that leads to the nucleation of bubbles, also known as thermocavitation. During the growth of the bubble, the surrounding liquid is expelled from the constraining microfluidic channel through a nozzle, creating a jet. The characteristics of the resulting liquid jet were imaged using ultra-fast imaging techniques. Here, we provide a phenomenological description of the jet shapes and velocities and compare them with a boundary integral numerical model. We define the parameter regime, varying jet speed, taper geometry, and liquid volume for optimal printing, injection, and spray applications. These results are important for the design of energy-efficient needle-free jet injectors based on microfluidic thermocavitation.
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14 March 2020
Research Article|
March 10 2020
Microfluidics control the ballistic energy of thermocavitation liquid jets for needle-free injections
Loreto Oyarte Gálvez
;
Loreto Oyarte Gálvez
a)
1
Mesoscale Chemical Systems Group, MESA+ Institute, TechMed Centre and Faculty of Science and Technology, University of Twente
, P.O. Box 217, 7500AE Enschede, The Netherlands
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Arjan Fraters
;
Arjan Fraters
2
Physics of Fluids Group, MESA+ Institute, TechMed Centre, University of Twente
, P.O. Box 217, 7500AE Enschede, The Netherlands
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Herman L. Offerhaus
;
Herman L. Offerhaus
3
Optical Science Group, MESA+ Institute and Faculty of Science and Technology, University of Twente
, P.O. Box 217, 7500AE Enschede, The Netherlands
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Michel Versluis
;
Michel Versluis
2
Physics of Fluids Group, MESA+ Institute, TechMed Centre, University of Twente
, P.O. Box 217, 7500AE Enschede, The Netherlands
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Ian W. Hunter;
Ian W. Hunter
4
BioInstrumentation Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology
, Cambridge, Massachusetts 02139, USA
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David Fernández Rivas
David Fernández Rivas
b)
1
Mesoscale Chemical Systems Group, MESA+ Institute, TechMed Centre and Faculty of Science and Technology, University of Twente
, P.O. Box 217, 7500AE Enschede, The Netherlands
4
BioInstrumentation Laboratory, Department of Mechanical Engineering, Massachusetts Institute of Technology
, Cambridge, Massachusetts 02139, USA
b)Author to whom correspondence should be addressed: d.fernandezrivas@utwente.nl
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a)
Current address: Department of Ecological Science, Faculty of Earth and Life Sciences, Vrije Universiteit Amsterdam, Amsterdam 1081HV, The Netherlands
b)Author to whom correspondence should be addressed: d.fernandezrivas@utwente.nl
J. Appl. Phys. 127, 104901 (2020)
Article history
Received:
November 26 2019
Accepted:
February 18 2020
Citation
Loreto Oyarte Gálvez, Arjan Fraters, Herman L. Offerhaus, Michel Versluis, Ian W. Hunter, David Fernández Rivas; Microfluidics control the ballistic energy of thermocavitation liquid jets for needle-free injections. J. Appl. Phys. 14 March 2020; 127 (10): 104901. https://doi.org/10.1063/1.5140264
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