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Breakup of drops around the edges of Rushton turbine

Patil, Pramod and Kumar, Sanjeev (2010) Breakup of drops around the edges of Rushton turbine. In: Canadian Journal of Chemical Engineering, 88 (6). pp. 912-918.

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/cjce.20...


A detailed experimental and simulation study has been carried out in the present work to understand drop breakup in regions around the edge of the Rushton turbine in agitated vessels. The effect of impeller speed, impeller size, interfacial tension, and the viscosities of the two phases is studied on drop breakup through their effect on dmax, the size of the largest drop in the system, and the whole size distribution. The measurements were carried out using Galai particle size analyser and optical microscope. Experimental analysis shows that the dmax, maximum stable drop diameter varies with impeller tip velocity to the power -1. The variation of dmax with interfacial tension is studied using different surfactants. The effect of viscosity ratio, achieved by changing the dispersed phase viscosity, on dmax is captured. For the same dmax values obtained from two different dispersed phases show that the wider drop size distribution is observed for higher dispersed phase viscosity.

Item Type: Journal Article
Publication: Canadian Journal of Chemical Engineering
Publisher: John Wiley and Sons
Additional Information: Copyright of this article belongs to John Wiley and Sons.
Keywords: Drop breakup and coalescence; turbulence; fluid mechanics; liquid-liquid dispersions; surfaces; interfaces and thin films; fluid mechanics.
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 21 Dec 2010 11:33
Last Modified: 21 Dec 2010 11:33
URI: http://eprints.iisc.ac.in/id/eprint/34586

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