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- Title
Hydrodynamics of gas/liquid/liquid double emulsions generated in a circular microchannel.
- Authors
Zhang, Mei; Zeng, Yuanyuan; Liu, Dingsheng
- Abstract
Monodispersed gas/liquid/liquid (G/L/L) double emulsions generated in microfluidic devices have attracted much attention from academic communities to industry fields. In this paper, a numerical simulation method, volume of fluid (VOF) technique, was adopted to study the hydrodynamics of G/L/L double emulsions generated in a circular flow-focusing microchannel. The generation process of double emulsions was presented in detail. The velocity fields inside and outside double emulsions were described. The effects of different phase fluid flow rates, the ratio of outer to middle flow rates, and the ratio of middle to inner flow rates on the size and generation frequency of double emulsions were studied, respectively. The eccentricities and the deformation indices of double emulsions were all explored as well. This work is helpful to understand the physical mechanism of the hydrodynamics of G/L/L double emulsions, and useful to produce and control G/L/L double emulsions in practical applications. [Display omitted] • Processes and models of G/L/L double emulsion generation were presented in detail. • Velocity fields, sizes and flow regimes of G/L/L double emulsions were studied numerically. • Eccentricities and deformation indices of G/L/L double emulsions were investigated deeply.
- Subjects
EMULSIONS; HYDRODYNAMICS; MICROFLUIDIC devices; FLUID flow; SECOND harmonic generation; FOOD emulsions; MONODISPERSE colloids
- Publication
Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A, 2023, Vol 193, p768
- ISSN
0263-8762
- Publication type
Article
- DOI
10.1016/j.cherd.2023.04.026