| Investigation of Phase Inversion of Liquid-Liquid Dispersions in Agitated Vessels |
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| 作者姓名： | Omar K. Matar Panagiota Angeli Geoffrey F. Hewitt E. Susana Pérez de Ortiz |
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| 作者单位： | Department of Chemical Engineering Imperial College London Prince Consort Road London SW7 2BY UK，Department of Chemical Engineering University College London Torrington Place London WC1E 7JE UK，Department of Chemical Engineering Imperial College London Prince Consort Road London SW7 2BY UK，Department of Chemical Engineering Imperial College London Prince Consort Road London SW7 2BY UK |
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| 基金项目： | Supported by the EPSRC (Nos. GR/R54699/01 and GR/R56044/01). |
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| 摘 要： | Introduction Liquid-liquid dispersions in agitated vessels are fre-quently used in the chemical industry for conducting operations such as solvent extraction and heterogene-ous reactions. In liquid-liquid two-phase flow systems, usually consisting of an a…
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| 关 键 词： | 相转化 液-液分散 搅拌槽 激光诱导荧光 |
| 收稿时间： | 2005-10-09 |
| 修稿时间： | 2005-10-09 |
Investigation of Phase Inversion of Liquid-Liquid Dispersions in Agitated Vessels |
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| Bin Hu, Lan Liu, Omar K. Matar, Panagiota Angeli, Geoffrey F. Hewitt,E. Susana Prez de Ortiz.Investigation of Phase Inversion of Liquid-Liquid Dispersions in Agitated Vessels[J].Tsinghua Science and Technology,2006,11(2):202-206. |
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| Authors: | Bin Hu Lan Liu Omar K Matar Panagiota Angeli Geoffrey F Hewitt E Susana Prez de Ortiz |
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| Institution: | aDepartment of Chemical Engineering, University College London, Torrington Place, London, WC1E 7JE, UK;bDepartment of Chemical Engineering, Imperial College London, Prince Consort Road, London, SW7 2BY, UK |
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| Abstract: | 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 accom-pany the inversion process, such as secondary dispersions and drop coalescence and breakup. Theoreti-cally, 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. |
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| Keywords: | phase inversion liquid-liquid dispersions agitated vessels laser-induced fluorescence |
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