A Study on Effect of Wetting on Mechanism of Coalescence in a Model Coalescer

Basu, Suddhasatwa (1993) A Study on Effect of Wetting on Mechanism of Coalescence in a Model Coalescer. In: Journal of Colloid and Interface Science, 159 (1). pp. 68-76.

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Abstract

In order to depict the mechanism of coalescence in fibrous bed coalescers, a model coalescer was fabricated. Both water/oil and oil/water dispersions were run through this model coalescer to check for coalescence on PTFE and glass surfaces. The equilibrium contact angle and the dynamic contact angle of the dispersed drops were measured on these surfaces in the presence of the continuous phase. Coalescence was monitored using a microscope. Based on these observations a mechanism of coalescence in the model coalescer is proposed. Different modes of coalescence are correlated to the equilibrium contact angle and the dynamic contact angle. Deposition of dirt on the coalescing surface is observed to result in change of wettability, leading to redispersion of the already coalesced dispersed phase into larger droplets.

Item Type:	Journal Article
Publication:	Journal of Colloid and Interface Science
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	02 Feb 2011 09:52
Last Modified:	02 Feb 2011 09:52
URI:	http://eprints.iisc.ac.in/id/eprint/35336

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