Journal article

An experimental study on single drop rising in a low interfacial tension liquid–liquid system

J Zhang, Y Wang, GW Stevens, W Fei

Chemical Engineering Research and Design | Elsevier | Published : 2019


Terminal velocity of liquid drops is one of the key parameters in liquid–liquid extraction column design. It is important in determining residence time, droplet lifetime, and mass transfer rate. In present paper, the rising behavior of a single drops were investigated in a low interfacial tension system by high speed camera. An n-butanol/water system was used as test system. Correlations for terminal velocity were evaluated and compared, both explicitly and implicitly. Moreover, the influence of salt addition in aqueous phase was also studied, including salt concentrations and types. A Weber–Reynolds correlation was derived on the basis of experimental data. Drag coefficient was then calcula..

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Awarded by Australian Research Council

Funding Acknowledgements

This research was carried out under the National NaturalScience Foundation of China (21636004), the National SafetyAcademy Foundation (U1530107), the National Key BasicResearch Program of China (No.2012CBA01203) in the StateKey Laboratory of Chemical Engineering of Tsinghua Univer-sity, Beijing, China. The authors gratefully acknowledge thesegrants.