Bubble formation at closely spaced orifices in aqueous solutions

Solanki, MKS and Mukherjee, AK and Das, TR (1992) Bubble formation at closely spaced orifices in aqueous solutions. In: The Chemical Engineering Journal, 49 (1). pp. 65-71.

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Abstract

A filter cloth with 182 holes per 10−4 m2 has been used to generate air bubbles both in pure water and in aqueous solutions of electrolytes and non-electrolytes at various air flow rates. Potassium bromide and ammonium perchlorate were the electrolytes used, while the non-electrolytes were isopropanol, urea and glycerol. Bubble diameters and their size distribution were measured from photographs. The role of solutes in affecting bubble sizes and their distribution compared to that of pure water is discussed in the light of a hypothesis. This hypothesis assumes that if the final bubble diameter is less than the inter-orifice distance, then bubbles do not coalesce; on the other hand, if it is greater, then coalescence occurs when tf greater-or-equal, slantedti+ts, but does not occur when t<ti+ts. Further, the bimodal size distribution is explained by the idea of a phase lag.

Item Type:	Journal Article
Publication:	The Chemical Engineering Journal
Publisher:	Elsevier science
Additional Information:	Copyright of this article belongs to Elsevier science.
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	25 Jan 2011 10:28
Last Modified:	25 Jan 2011 10:28
URI:	http://eprints.iisc.ac.in/id/eprint/35103

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