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Modeling the effect of drop charge on coalescence in turbulent liquid—liquid dispersions
Author(s) -
Tobin Thomas,
Ramkrishna Doraiswami
Publication year - 1999
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450770603
Subject(s) - drop (telecommunication) , coalescence (physics) , electrolyte , mechanics , liquid drop , turbulence , materials science , liquid liquid , chemical physics , chemistry , physics , chromatography , engineering , mechanical engineering , astrobiology , electrode
In this work, a mechanistic model of drop coalescence based upon a stochastic film‐drainage analysis is developed. The coalescence model accounts for previously considered factors, such as turbulence intensity, drop size, and drop deformability, while additionally describing the dual effects of drop surface potential and system electrolyte concentration. Model results indicate that electrostatic repulsion may strongly inhibit small drop coalescence, as well as coalescence between larger deformable drops. Comparison of model predictions to data from several transient coalescence experiments shows good agreement in most cases.