Abstract
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.
Original language | English |
---|---|
Pages (from-to) | 50-85 |
Number of pages | 36 |
Journal | Physica A: Statistical Mechanics and its Applications |
Volume | 276 |
Issue number | 1 |
DOIs | |
State | Published - Feb 1 2000 |