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Determination of dynamic surface tension and viscosity of non-Newtonian fluids from drop oscillations

Yang, Lisong; Kazmierski, Bethany K.; Hoath, Stephen D.; Jung, Sungjune; Hsiao, Wen-Kai; Wang, Yiwei; Berson, Arganthaël; Harlen, Oliver; Kapur, Nik; Bain, Colin D.

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Authors

Bethany K. Kazmierski

Stephen D. Hoath

Sungjune Jung

Wen-Kai Hsiao

Yiwei Wang

Arganthaël Berson

Oliver Harlen

Nik Kapur



Abstract

The oscillations of free-falling drops with size range from pl to μl have been used to measure the transient shear viscosity and the dynamic surface tension of shear-thinning fluids on the timescale of 10−5–10−2 s. The method is first validated with Newtonian fluids. For a given surface tension, the lower and upper limits for accurate measurement of the viscosity are determined as a function of drop size. The dynamic properties of two types of shear-thinning fluids with varying viscoelasticity are reported: aqueous suspensions of the antifungal drug griseofulvin and of the organic light-emitting diode material poly(3,4-ethylenedioxythiophene): polystyrene-sulphonate. In both cases, the free-falling drop retains the high-shear viscosity.

Citation

Yang, L., Kazmierski, B. K., Hoath, S. D., Jung, S., Hsiao, W., Wang, Y., …Bain, C. D. (2014). Determination of dynamic surface tension and viscosity of non-Newtonian fluids from drop oscillations. Physics of Fluids, 26(11), Article 113103. https://doi.org/10.1063/1.4901823

Journal Article Type Article
Acceptance Date Oct 31, 2014
Online Publication Date Nov 19, 2014
Publication Date 2014
Deposit Date Oct 5, 2021
Publicly Available Date Oct 6, 2021
Journal Physics of Fluids
Print ISSN 1070-6631
Electronic ISSN 1089-7666
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 26
Issue 11
Article Number 113103
DOI https://doi.org/10.1063/1.4901823

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