论文标题
乳液中粒子悬浮液的不稳定和相位分离
Destabilization and phase separation of particle suspensions in emulsions
论文作者
论文摘要
屈服应力流体被广泛用于工业应用中，以阻止致密的固体颗粒，可以使用浓缩乳液作为模型流体来研究。我们在实验中显示，乳液中的颗粒沉积无法通过嵌入屈服应力流体中的球体的经典标准来预测。相位分离过程发生，液体层形成并通过乳液排水增强了颗粒沉积。此外，乳液中嵌入乳液中的颗粒量可以停止或增强乳液排水。在数值模拟中开发和求解了最小的数学模型，以描述存在颗粒存在的乳液引流，这与实验稳定性图和沉积动力学相比有利地比较。
Yield stress fluids are widely used in industrial application to arrest dense solid particles, which can be studied by using a concentrated emulsion as a model fluid. We show in experiments that particle sedimentation in emulsions cannot be predicted by the classical criterion for spheres embedded in a yield stress fluid. Phase separation processes take place, where a liquid layer forms and particle sedimentation is enhanced by the emulsion drainage. In addition, emulsion drainage can be arrested or enhanced by the amount of particles embedded in the emulsion. A minimal mathematical model is developed and solved in numerical simulations to describe the emulsion drainage in the presence of particles, which favorably compares with the experimental stability diagram and the sedimentation dynamics.
