A mesoscopic rheological model of immiscible blends with the interface covered with a surface active agent

作者：Gu Jian Feng; Grmela Miroslav^*; Bousmina Mosto

来源：Physics of Fluids, 2008, 20(4): 043102.

DOI：10.1063/1.2907792

The Maffettone-Minale mesoscopic rheological model of immiscible blends is extended to blends that include a surface active agent. Its nonuniform distribution on the interface (assumed to be the surface of droplets) and the associated with it nonuniform distribution of the surface tension and the Marangoni stress are incorporated into the model. Instead of using one ellipsoid (one conformation tensor in the mathematical formulation) to characterize the shape of the droplet, we use a one parameter family of ellipsoids (a "necklace" of ellipsoids) to play this role. Both rheology and morphology (including large deviations form the ellipsoidal shape of droplets) are calculated and compared to predictions of microscopic models (i.e., models based on microhydrodynamics) and with results of experimental observations.

• 出版日期2008-4