Online measurements of surface tensions and viscosities based on the hydrodynamics of Taylor flow in a microchannel

This paper demonstrates an onlinemeasurement technique which canmeasure bothsurface tension andviscosity for confined fluids in microfluidic systems. Thesurface tension andviscosity are determined by monitoring theliquid film thickness deposited in a microchannel based on the hydrodynamics of Taylorflow.Measurements were carried out for pureliquids and binary aqueousliquid mixtures. The results agreed well with reference data and theoretical models. This novel method has considerable potential formeasuring dynamic interfacial tension of complex mixtures. Furthermore, it offers opportunity for integrating propertymeasurement with two-phaseflow in microchannel, opening new lines of applications.

Source: Review of Scientific Instruments - November 17, 2016 Category: Physics Authors: Yanhong Sun, Chaohong Guo, Yuyan Jiang, Tao Wang and Lei Zhang Source Type: research