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Investigation of phase inversion of liquid-liquid dispersions in agitated vessels

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6 Author(s)
Hu, Bin ; Department of Chemical Engineering, University College London, Torrington Place, London, WCIE 7JE, UK; Department of Chemical Engineering, Imperial College London, Prince Consort Road, London, SW7 2BY, UK ; Liu, Lan ; Matar, Omar K. ; Anqeli, Panagiota
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In this paper we report results from on-going theoretical and experimental studies carried out jointly at Imperial College London and University College London. Laser-induced fluorescence (LIF) is used to investigate liquid-liquid phase inversion experimentally and to observe in detail phenomena that accompany the inversion process, such as secondary dispersions and drop coalescence and breakup. Theoretically, a two-region model together with a criterion based on a dynamic balance between drop coalescence and breakup is employed to predict phase inversion. The concept of a radial distribution function for hard spheres was also utilized in order to better model the interaction of drops at high dispersed phase holdup. The modeling work is capable of predicting the existence of ambivalent ranges which are in good agreement with experimental observations.

Published in:

Tsinghua Science and Technology  (Volume:11 ,  Issue: 2 )

Date of Publication:

April 2006

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