Free-Surface Suspension Flow: Flow-Induced Migration and Surface Morphology

将通过实验和计算研究高固体体积分数（0.3至0.55）的流动的液-固颗粒混合物和相邻的不混溶流体之间的界面处发生的现象。 将研究颗粒向界面迁移的影响和界面表面的形状。 将使用与载液具有相同密度和相同光学指数的球体的非胶体悬浮液进行实验。 成像和激光多普勒测速（LDV）将提供有关流动微观结构，平均速度和两相和不混溶流体之间的界面的信息。 重力驱动的悬浮液流和同心旋转圆柱体之间的自由表面被认为是插图。 拟议的研究项目与悬浮膜、涂层、挤出、混合和反应过程有关。

Phenomena occurring at the interface between a flowing liquid-solid particle mixture of high solid volume fraction (0.3 to 0.55) and an adjacent immiscible fluid will be experimentally and computationally investigated. The effects of particle migration towards the interface and the shape of the interfacial surface will be studied. The experiments will be performed with noncolloidal suspensions of spheres of same density and same optic index as the carrier fluid. Imaging and laser-Doppler velocimetry (LDV) will provide information on the flow microstructure, mean velocity and interface between the two-phase and immiscible fluid. Gravity-driven suspension flow and the free surface between concentric rotating cylinders are considered for illustrations. The proposed research project has relevance to suspension films, coatings, extrusion, mixing and reaction processes.