Modelling of turbulent drop coalescence in the presence of electrostatic forces
Wioletta Podgórska , Daniele Luca Marchisio
AbstractThe influence of ionic surfactant (SDS) on the drop size distribution in stirred liquid-liquid dispersions was considered. The destabilizing effect of a salt (NaBr) on the dispersion was also discussed. A new model for drop coalescence in turbulent flow in the presence of repulsive forces was derived. The film drainage between rigid and deformed droplets was taken into account. The influence of interfacial tension and electrostatic repulsion on the behavior of the dispersion in different zones of a stirred tank was predicted. It was also shown that, additional disruptive stresses, resulting from interfacial tension difference, due to surfactant desorption, increase drop breakage rate. In both breakage and coalescence models local intermittency was taken into account by using the multifractal formalism. Drop size distributions were predicted, by solving the population balance equation, and compared with experimental data.
|Journal series||Chemical Engineering Research & Design, ISSN 0263-8762|
|Publication size in sheets||0.55|
|Conference||15th European Conference on Mixing, 28-06-2015 - 03-07-2015, Saint-Petersburg, Rosja|
|Keywords in Polish||podwójna warstwa elektryczna, multifraktalny model rozpadu, multifraktalny model koalescencji, bilans populacji, SDS|
|Keywords in English||electrical double layer, electrolyte, multifractal breakage model, multifractal coalescence model, population balance equation, sodium dodecyl sulfate|
|Score|| = 30.0, 28-11-2017, ArticleFromJournalAndMatConfByIndicator|
= 30.0, 28-11-2017, ArticleFromJournalAndMatConfByIndicator
|Publication indicators||: 2016 = 2.538 (2) - 2016=2.82 (5)|
|Uwagi||Volume 108, Special Issue edited by Bałdyga Jerzy Robert, Kresta Suzanne, Line Alain, Abiev Rufat|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.