Relative viscosity of emulsions in simple shear flow: Temperature, shear rate, and interfacial tension dependence

被引：0

作者：

Dept. of Mechanical Engineering, Yonsei Univ., Korea, Republic of ^{[1
]}

机构：

[1] Dept. of Mechanical Engineering, Yonsei Univ.

来源：

Trans. Korean Soc. Mech. Eng., B | / 8卷 / 677-682期

关键词：

Emulsion; Interface; Lattice boltzmann method; Rheology;

D O I：

10.3795/KSME-B.2015.39.8.677

中图分类号：

学科分类号：

摘要：

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. © 2015 The Korean Society of Mechanical Engineers.

引用

页码：677 / 682

页数：5

共 20 条

[1]

Edwards D.A., Brenner H., Wasan D.T., Interfacial Transport Processes and Rheology, (1991)

[2]

Langevin D., Rheology of adsorbed surfactant monolayers at fluid surfaces, Annu. Rev. Fluid Mech., 46, pp. 47-65, (2014)

[3]

Janssen J.J.M., Boon A., Agterof W.G.M., Influence of dynamic interfacial properties on droplet breakup in simple shear flow, AIChE Journal, 40, 12, pp. 1929-1939, (1994)

[4]

Bos M.A., Van Vliet T., Interfacial rheological properties of adsorbed protein layers and surfactants: A review, Adv. Colloid Interface Sci., 91, 3, pp. 437-471, (2001)

[5]

Farhat H., Lee J.S., Suppressing the coalescence in the multi-component lattice boltzmann method, Microfluidics and Nanofluidics, 11, 2, pp. 137-143, (2011)

[6]

Choi S.B., Kondaraju S., Lee J.S., Study for optical manipulation of a surfactant-covered droplet using lattice boltzmann method, Biomicrofluidics, 8, 2, (2014)

[7]

Stone H.A., Leal L.G., The effects of surfactants on drop deformation and breakup, J. Fluid Mech., 220, pp. 161-186, (1990)

[8]

Eggleton C.D., Tsai T., Stebe K.J., Tip streaming from a drop in the presence of surfactants, Phys. Rev. Lett., 87, (2001)

[9]

Feigl K., Megias-Alguacil D., Fischer P., Windhab E.J., Simulation and experiments of droplet deformation and orientation in simple shear flow with surfactants, Chem. Eng. Sci., 62, 12, pp. 3242-3258, (2007)

[10]

Kondaraju S., Farhat H., Lee J.S., Study of aggregational characteristics of emulsions on their rheological properties using the lattice boltzmann approach, Soft Matter, 8, pp. 1374-1384, (2012)

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