Rheology of a dilute emulsion of surfactant-covered spherical drops

被引：44

作者：

Blawzdziewicz, J. ^{[1
]}

Vlahovska, P. ^{[1
]}

Loewenberg, M. ^{[1
]}

机构：

[1] Department of Chemical Engineering, Yale University, P.O. Box 208286, New Haven, CT 06520-8286, United States

来源：

Physica A: Statistical Mechanics and its Applications | 2000年 / 276卷 / 01期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

Convergence of numerical methods - Drop formation - Emulsions - Mathematical models - Matrix algebra - Perturbation techniques - Rheology - Shear stress - Surface active agents - Viscosity;

D O I：

10.1016/S0378-4371(99)00366-0

中图分类号：

学科分类号：

摘要：

The rheology of a diluted emulsion of surfactant-covered spherical drops has been investigated. A diluted film of insoluble surfactant is assumed. A matrix formulation of the problem is derived and analyzed by perturbation expansions for low- and high-shear rates, and for high-viscosity drops; the high-viscosity expansion converges rapidly for a wide range of parameters. Our theory provides a quantitative description of shear thinning and normal stress differences that occur as a result of surfactant redistribution.

引用

页码：50 / 85