Study of aggregational characteristics of emulsions on their rheological properties using the lattice Boltzmann approach

Sasidhar Kondaraju, Hassan Farhat, Joon Sang Lee

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Predicting the rheological properties of emulsions is one of the most challenging and complicated problems in material and fluid sciences. Substantial complications in prediction of rheology arise due to the deformability and aggregation of emulsions. Thus a better understanding of deformation and aggregation of emulsions can lead to a better understanding of the shear thinning region of emulsions. Though numerous experimental and theoretical studies were performed to obtain rheological correlations of emulsions, their inability to visualize and understand the droplet deformation in the presence of large volume fractions has stagnated our understanding of the shear thinning behavior of emulsions. With the aid of a numerical tool, which can help in visualizing the droplet deformation and correlate it to rheological behavior of emulsions, we have made an attempt to understand the physics behind the shear thinning behavior and also predict its rheological characteristics for emulsions at different volume fractions. In this article, we try to obtain a theoretical understanding of the influence of deformation and de-aggregation of droplets on the emulsion rheology. Simulations performed in this article using a multi-component lattice Boltzmann model are used to quantify (a) relative viscosity of emulsions with change in shear rate, (b) relative viscosity of emulsions with change in time, (c) effect of deformation of droplets on the shear thinning region in emulsions, and (d) relative viscosity of emulsions with change in volume fraction.

Original languageEnglish
Pages (from-to)1374-1384
Number of pages11
JournalSoft Matter
Volume8
Issue number5
DOIs
Publication statusPublished - 2012 Feb 7

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Emulsions
emulsions
shear thinning
Shear thinning
Volume fraction
Agglomeration
Viscosity
viscosity
Rheology
rheology
Formability
materials science
Shear deformation
Physics
shear

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

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Study of aggregational characteristics of emulsions on their rheological properties using the lattice Boltzmann approach. / Kondaraju, Sasidhar; Farhat, Hassan; Lee, Joon Sang.

In: Soft Matter, Vol. 8, No. 5, 07.02.2012, p. 1374-1384.

Research output: Contribution to journalArticle

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