Multiscale rheological modeling of complex fluids

该项目的一部分是对从微观到宏观系统的中观和宏观观点的新现象的出现进行基础研究。其主要目标之一是确定一个一般框架的控制方程，保证他们的解决方案与某些基本的实验观察结果一致。该框架，然后在第二部分中应用到复杂流体的流变学和热力学建模。其目的是建立一个分子和微观结构的性质和介观性质（如热力学，流变学和机械性能）的另一边之间的关系。根据技术的重要性以及我们对互补的、实验导向的研究结果的访问，选择特定的复杂流体。我们建议继续研究：（i）聚合物流体的不混溶共混物（包括在流动下从可溶解性到不可溶解性的通道），（ii）聚合物-层状硅酸盐纳米复合材料，（iii）牛顿流体和聚合物流体中的半稀胶体悬浮液，（iv）稀聚合物溶液经受湍流（减阻问题），和（v）玻璃。

A part of the project is a fundamental research in the emergence of new phenomena in the passage from microscopic to mesoscopic and macroscopic viewpoints of macroscopic systems. One of its main objectives is to identify a general framework for the governing equations guaranteeing that their solutions agree with results of certain fundamental experimental observations. The framework is then applied in the second part to rheological and thermodynamic modeling of complex fluids. The objective is to establish a relation between molecular and microstructural properties on the one side and mesoscopic properties (like thermodynamic, rheological, and mechanical properties) on the other side. Specific complex fluids are chosen according to the importance in technology and according to our access to results of a complementary, experimentally oriented, research. We propose to continue to investigate: (i) immiscible blends of polymeric fluids (including the passage from miscibility to immiscibility under flow), (ii) polymer-layered silicate nanocomposites, (iii) semidilute colloidal suspensions in Newtonian and polymeric fluids, (iv) dilute polymeric solutions subjected to turbulent flows (the problem of drag reduction), and  (v) glasses.