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A new model for the drag coefficient of a swarm of condensing vapour-liquid bubbles in a third immiscible liquid phase

Mahood, HB, Campbell, AN, Thorpe, RB and Sharif, AO (2015) A new model for the drag coefficient of a swarm of condensing vapour-liquid bubbles in a third immiscible liquid phase CHEMICAL ENGINEERING SCIENCE, 131. pp. 76-83.

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Abstract

A semi-analytical model for the drag coefficient of a swarm of two-phase bubbles, condensing in direct contact with an immiscible sub-cooled liquid, has been developed. The analysis used a cellular model configuration, assuming potential (but not inviscid) flow around the reference two-phase bubble in the cell. The effect of the condensation ratio within the two-phase bubbles was included using an approximate relation. The drag coefficient for a wide range of Reynolds numbers (0.1. ≤. Re. ≤. 1000) has been found using the viscous dissipation integral method, and the effect of the liquid content within the two-phase bubble or the half opening angle (β), and the system void fraction (α) were examined. The drag coefficient has been found to increase with the condensation ratio and with the void fraction of the system. The present model agrees well with previously available experimental data and theoretical predictions for single bubbles or particles.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
AuthorsEmailORCID
Mahood, HBUNSPECIFIEDUNSPECIFIED
Campbell, ANUNSPECIFIEDUNSPECIFIED
Thorpe, RBUNSPECIFIEDUNSPECIFIED
Sharif, AOUNSPECIFIEDUNSPECIFIED
Date : 8 July 2015
Identification Number : 10.1016/j.ces.2015.03.053
Additional Information : © 2015 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Depositing User : Symplectic Elements
Date Deposited : 16 Sep 2015 13:09
Last Modified : 08 Jul 2016 01:08
URI: http://epubs.surrey.ac.uk/id/eprint/807462

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