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http://dx.doi.org/10.3795/KSME-B.2015.39.8.677

Relative Viscosity of Emulsions in Simple Shear Flow: Temperature, Shear Rate, and Interfacial Tension Dependence  

Choi, Se Bin (Dept. of Mechanical Engineering, Yonsei Univ.)
Lee, Joon Sang (Dept. of Mechanical Engineering, Yonsei Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.39, no.8, 2015 , pp. 677-682 More about this Journal
Abstract
We simulate an emulsion system under simple shear rates to analyze its rheological characteristics using the lattice Boltzmann method (LBM). We calculate the relative viscosity of an emulsion under a simple shear flow along with changes in temperature, shear rate, and surfactant concentration. The relative viscosity of emulsions decreased with an increase in temperature. We observed the shear-thinning phenomena, which is responsible for the inverse proportion between the shear rate and viscosity. An increase in the interfacial tension caused a decrease in the relative viscosity of the decane-in-water emulsion because the increased deformation caused by the decreased interfacial tension significantly influenced the wall shear stress.
Keywords
Rheology; Emulsion; Interface; Lattice Boltzmann Method;
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