Effect of rheology of dense emulsions on the flow structure in agitated systems

Jerzy Robert Bałdyga , Magdalena Jasińska , Adam J. Kowalski

Abstract

In manufacturing and applying emulsions it is often necessary to predict or control their flow and adjust their viscosity. A new method is presented for including the effect of the droplet size distribution on the rheological behaviour of dense oil-in-water emulsions of noncolloidal droplets. The method is based on extension of the advanced model for the relative viscosity of the concentrated monodisperse emulsion to account for polydispersity effects. The model includes effects of volume fraction of the dispersed phase, droplet size distribution, interfacial tension and shear rate on the relative emulsion viscosity. The model has universal character and can be combined with the population balance equation and CFD. Examples of modelling are presented for laminar and turbulent flows of dense emulsions. In the case of laminar flow the Couette flow and the Taylor–Couette flow are considered. In the case of turbulent flow it is shown how dispersion of droplets in the high-shear rotor-stator mixer affects the flow pattern and rheology of the emulsion product.
Author Jerzy Robert Bałdyga ZIDRCh
Jerzy Robert Bałdyga,,
- Department of Chemical Reactor Engineering and Dynamics
, Magdalena Jasińska ZIDRCh
Magdalena Jasińska,,
- Department of Chemical Reactor Engineering and Dynamics
, Adam J. Kowalski
Adam J. Kowalski,,
-
Journal seriesChemical Engineering Research & Design, ISSN 0263-8762
Issue year2016
Vol108
NoSI
Pages3-12
Publication size in sheets0.5
Conference15th European Conference on Mixing, 28-06-2015 - 03-07-2015, Saint-Petersburg, Rosja
Keywords in EnglishCouette-Taylor flow, dense emulsions, drop dispersion, rheology, rotor-stator mixer
DOIDOI:10.1016/j.cherd.2015.11.026
URL http://www.sciencedirect.com/science/article/pii/S0263876215004955
Languageen angielski
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Bałdyga J.R. (i in.) - Effect of rheology....pdf (file archived - login or check accessibility on faculty) Bałdyga J.R. (i in.) - Effect of rheology....pdf 2.35 MB
Score (nominal)30
ScoreMinisterial score = 30.0, 28-11-2017, ArticleFromJournalAndMatConfByIndicator
Ministerial score (2013-2016) = 30.0, 28-11-2017, ArticleFromJournalAndMatConfByIndicator
Publication indicators WoS Impact Factor: 2016 = 2.538 (2) - 2016=2.82 (5)
Citation count*0
Additional fields
UwagiVolume 108 edited by Jerzy Bałdyga, Suzanne Kresta, Alain Line and Rufat Abiev
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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