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Study of liquid jet instability by confocal microscopy

Yang, Lisong; Adamson, Leanne J.; Bain, Colin D.

Study of liquid jet instability by confocal microscopy Thumbnail


Authors

Leanne J. Adamson



Abstract

The instability of a liquid microjet was used to measure the dynamic surface tension of liquids at the surface ages of ≤1 ms using confocal microscopy. The reflected light from a laser beam at normal incidence to the jet surface is linear in the displacement of the surface near the confocal position, leading to a radial resolution of 4 nm and a dynamic range of 4 μm in the surface position, thus permitting the measurement of amplitude of oscillation at the very early stage of jet instability. For larger oscillations outside the linear region of the confocal response, the swell and neck position of the jet can be located separately and the amplitude of oscillation determined with an accuracy of 0.2 μm. The growth rate of periodically perturbed water and ethanol/water mixture jets with a 100-μm diameter nozzle and mean velocity of 5.7 m s−1 has been measured. The dynamic surface tension was determined from the growth rate of the instability with a linear, axisymmetric, constant property model. Synchronisation of the confocal imaging system with the perturbation applied to the jet permitted a detailed study of the temporal evolution of the neck into a ligament and eventually into a satellite drop.

Citation

Yang, L., Adamson, L. J., & Bain, C. D. (2012). Study of liquid jet instability by confocal microscopy. Review of Scientific Instruments, 83(7), Article 073104. https://doi.org/10.1063/1.4734017

Journal Article Type Article
Acceptance Date Jun 22, 2012
Online Publication Date Jul 12, 2012
Publication Date 2012
Deposit Date Oct 5, 2021
Publicly Available Date Oct 6, 2021
Journal Review of Scientific Instruments
Print ISSN 0034-6748
Electronic ISSN 1089-7623
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 83
Issue 7
Article Number 073104
DOI https://doi.org/10.1063/1.4734017
Public URL https://durham-repository.worktribe.com/output/1229005

Files

Published Journal Article (1.6 Mb)
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Copyright Statement
© 2012 American Institute of Physics






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