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Main Title: Influence of drop size and superimposed mass transfer on coalescence in liquid/liquid dispersions - Test cell design for single drop investigations
Author(s): Kamp, Johannes
Kraume, Matthias
Type: Article
Language Code: English
Is Part Of: 10.14279/depositonce-6528
Abstract: The detailed understanding of droplet coalescence is important for the accurate description of liquid/liquid dispersions. A test cell is designed which enables serial examinations of the random coalescence process with high repetition rate, good observability and accuracy of experimental parameters. Within this rectangular test cell a rising droplet collides with a pendant one, while recorded by a high speed camera. The gained experimental data allows a validation and further development of appropriate models. The investigated parameters in this work are the drop size and the superimposed mass transfer influencing the coalescence probability. These examinations were carried out in the EFCE standard test system toluene/acetone/water. The effect of varying the drop size seems to be interfered by the different rising velocities due to buoyancy. Introducing a transferring component has a significant impact on the coalescence process. A transfer direction from disperse to continuous phase results in a coalescence probability of almost 100%, whereas the reverse mass transfer direction induces a repulsion of nearly all droplets. (C) 2013 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
Issue Date: 2014
Date Available: 16-Feb-2018
DDC Class: 629 Andere Fachrichtungen der Ingenieurwissenschaften
Subject(s): coalescence
test cell
single drop
mass transfer
drop size
coalescence probability
Journal Title: Chemical Engineering Research and Design
Publisher: Elsevier
Publisher Place: Amsterdam [u.a.]
Volume: 92
Issue: 4
Publisher DOI: 10.1016/j.cherd.2013.12.023
Page Start: 635
Page End: 643
EISSN: 1744-3563
ISSN: 0263-8762
Appears in Collections:FG Verfahrenstechnik » Publications

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