Rheology of Complex Fluids in Equibiaxial Elongational Flows

1236576金星复杂流体的流动无处不在，在自然界和现代制造技术中都可以找到。合成聚合物、生物流体和食品是复杂流体的常见例子，它们表现出难以实验测量和理论预测的流变或流动行为。一种称为连续润滑挤压流（CLSF）的新型流变学技术被用于研究聚合物液体在等双轴延伸流中的流变行为，这涉及到流体在两个方向上的拉伸。这项研究允许建立迄今为止不可用的结构-性质关系，这对聚合物化学家和工艺工程师以及理论家在努力开发聚合物动力学分子模型方面将是非常宝贵的。提高对聚合物流动行为的理解将导致更有效的能源和材料利用以及先进加工方法的发展。伊利诺斯理工学院数学与科学教育系（MSE）的教师和学生开发了复杂流体的教学模块，这一扩展部分与科学调查相结合。MSE系为芝加哥公立学校的高中教师建立了完善的教育和培训计划。

1236576VenerusFlows of complex fluids are ubiquitous and can be found both in nature and in modern manufacturing technologies. Synthetic polymers, biological fluids and foods are common examples of complex fluids that display rheological, or flow, behavior that is difficult to both measure experimentally and predict theoretically. A novel rheological technique called Continuous Lubricated Squeezing Flow (CLSF) is used to investigate the rheological behavior of polymeric liquids in equibiaxial elongation flows, which involves the stretching of a fluid in two directions. This study allows heretofore unavailable structure-property relations to be established that will be invaluable to polymer chemists and process engineers, as well as to theoreticians in their efforts to develop molecular models for polymer dynamics. An improved understanding of polymer flow behavior will result in more efficient energy and materials utilization and to the development of advanced processing methodologies. An outreach component is integrated with the scientific investigation that involves the development of instructional modules on complex fluids by faculty and students in the Department of Math and Science Education (MSE) at Illinois Institute of Technology. The MSE Department has well-established education and training programs for high-school teachers in the Chicago Public Schools.