CUED Publications database

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

Yang, L and Kazmierski, BK and Hoath, SD and Jung, S and Hsiao, WK and Wang, Y and Berson, A and Harlen, O and Kapur, N and Bain, CD (2014) Determination of dynamic surface tension and viscosity of non-Newtonian fluids from drop oscillations. Physics of Fluids, 26. ISSN 1070-6631

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Abstract

© 2014 AIP Publishing LLC. 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 b oth cases, the free-falling drop retains the high-shear viscosity.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div E > Production Processes
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:29
Last Modified: 07 Sep 2017 01:45
DOI: