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.

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.-K., Wang, Y., Berson, A., Harlen, O., Kapur, N., & 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
• Public URL: https://durham-repository.worktribe.com/output/1237471