A model for static foam drainage

Ramani, MV and Kumar, R and Gandhi, KS (1993) A model for static foam drainage. In: Chemical Engineering Science, 48 (3). pp. 455-465.

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Abstract

A model for static foam drainage, based on the pentagonal dodecahedral shape of bubbles, that takes into account the surface mobility of both films and Plateau border walls has been developed. The model divides the Plateau borders into nearly horizontal and nearly vertical categories and assigns different roles to them. The films are assumed to drain into all the adjacent Plateau borders equally. The horizontal Plateau borders are assumed to receive liquid from films and drain into vertical Plateau borders, which in turn form the main component for gravity drainage. The model yields the liquid holdup values for films, horizontal Plateau borders and vertical Plateau borders as functions of height and time. The model has been tested on static foams whose cumulative drainage was measured as a function of time. The experimental data on the effect of foam height, initial holdup, surface viscosity, etc. can be explained by the model quantitatively.

Item Type:	Journal Article
Publication:	Chemical Engineering Science
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	31 Jan 2011 12:14
Last Modified:	31 Jan 2011 12:14
URI:	http://eprints.iisc.ac.in/id/eprint/35279

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