Effect of interactions between multiple interfaces on the rheological characteristics of double emulsions

Se Bin Choi, Jae Yong Park, Ji Young Moon, and Joon Sang Lee
Phys. Rev. E 97, 062603 – Published 8 June 2018

Abstract

In this study, we analyzed the rheological characteristics of double emulsions by using a three-dimensional lattice Boltzmann model. Numerical simulations indicate that interactions between multiple interfaces play a vital role in determining the shear stress on interfaces and affect deformations, which influence the relative viscosity of double emulsions. The large shear stress induced by droplets in contact increases the relative viscosity for high volume fractions. The double emulsions also show shear-thinning behavior, which corresponds with the Carreau model. The interfacial interference between the core and the deforming shell cause the relative viscosity to increase with increasing core-droplet radius. Finally, we investigated the dependence of the double-emulsion viscosity on the core-droplet viscosity. At high shear rates, the relative viscosity increases with increasing core-droplet viscosity. However, the trend is opposite at low shear rates, which results from the high inward flow (Marangoni flow) at low core-droplet viscosity.

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  • Received 9 February 2018
  • Revised 11 May 2018

DOI:https://doi.org/10.1103/PhysRevE.97.062603

©2018 American Physical Society

Physics Subject Headings (PhySH)

Fluid Dynamics

Authors & Affiliations

Se Bin Choi1, Jae Yong Park1, Ji Young Moon2, and Joon Sang Lee1,*

  • 1Department of Mechanical Engineering, Yonsei University, Seoul 03722, Republic of Korea
  • 2Department of Mechanical & Mechatronic Engineering, The University of Sydney, Sydney NSW 2006, Australia

  • *joonlee@yonsei.ac.kr

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Vol. 97, Iss. 6 — June 2018

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