The Mechanics of Complex Fluids: Drop Breakup, Coalescence and Multiparticle Dynamics in Viscoalastic Liquids

摘要CTS-9970567L。加里·里尔，UCSB将研究复杂流体中液滴破碎和合并的机制，以及刚性颗粒剪切聚合物悬浮液中的各向异性微结构。聚合物液体的粘弹性行为和聚合物材料加工的相关领域将这些主题联系在一起。为了定量和理解非牛顿流体混合过程中控制液滴尺寸分布的机理，以及作为表面活性剂的相容剂的作用，将在四辊磨机上对各种聚合物共混物进行实验研究。在聚合物流体流动中，沿均匀和双分散颗粒系统流动方向排列的长颗粒链将作为平均流动的流变性、颗粒大小、浓度和剪切速率的函数来研究。在匹配折射率的悬浮液中的示踪剂颗粒将被记录在Couette设备中。本研究对聚合物材料的加工及其优化具有一定的指导意义。

AbstractCTS- 9970567L. Gary Leal, UCSBThe mechanics of drop breakup and coalescence in complex fluids and the anisotropic microstructure in shearing polymeric suspensions of rigid particles will be investigated. The viscoelastic behavior of the polymeric liquids and the area of relevance in polymer material processing connect these topics. Experimental studies in a four-roll mill will be performed with a microscale PIV system for various polymeric blends in order to quantify and understand the mechanisms that control the drop size distribution in a blending process of non-Newtonian fluids, and the effect of the compatibilizers that act as surfactants. The long particle chains aligned to the flow direction of uniform and bidisperse particle systems in polymeric fluid flow will be studied as a function of the rheological properties, particle size, concentration, and shear rate of the mean flow. Tracer particles in a matched index of refraction suspension will be recorded in a Couette device. The proposed research has relevance to polymeric material processing and its optimization.