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Main Title: From single drop coalescence to droplet swarms - Scale-up considering the influence of collision velocity and drop size on coalescence probability
Author(s): Kamp, Johannes
Kraume, Matthias
Type: Article
Language Code: English
Is Part Of: 10.14279/depositonce-6528
Abstract: Coalescence modelling in liquid/liquid dispersions is a challenging task and field of investigations up to now, which becomes apparent when comparing the various existent models with their different and partly even contradictive implementation of influencing factors. In this work, systematic investigations of single drop coalescence were used to compare and validate different coalescence efficiency models regarding the important influencing parameters relative collision velocity and drop size. The impact of these parameters could be analysed independently from each other for the first time and used to identify the best modelling approach. Moreover, the numerical parameter of the coalescence efficiency model could be obtained based on single drop experiments. Using this determined parameter the simulation of drop size distributions within a lab scale stirred vessel was possible. The presented method offers the possibility of independent parameter estimation for population balance equation simulations based on single drop experiments. The application of this systematic approach allows the separate validation of submodels and reliable parameter determination by small scale investigations. On this basis a sound scale-up is possible using population balance equation simulations. (C) 2016 Elsevier Ltd. All rights reserved.
Issue Date: 2016
Date Available: 16-Feb-2018
DDC Class: 629 Andere Fachrichtungen der Ingenieurwissenschaften
Subject(s): coalescence
coalescence efficiency
population balance equation
model validation
collision velocity
drop size
Journal Title: Chemical Engineering Science
Publisher: Elsevier
Publisher Place: Amsterdam [u.a.]
Volume: 156
Publisher DOI: 10.1016/j.ces.2016.08.028
Page Start: 162
Page End: 177
EISSN: 1873-4405
ISSN: 0009-2509
Appears in Collections:FG Verfahrenstechnik » Publications

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