Microstructure Control During Laminar Mixing of Inhomogeneous Fluids

非均匀流体层流混合过程中的微观结构控制

• 批准号: 9813020
• 负责人: Charles Tucker
• 金额: $ 27万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-10-01 至 2002-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9813020&HistoricalAwards=false
• 关键词: Microstructure; Control; During; Laminar; Mixing

DMI-9813020 Tucker This research examines mixing of inhomogeneous liquid-liquid systems, such as polymer blends. Mixing determines the fine-scale morphology of these materials, and their solid-state properties. This project is developing analytical and numerical tools to analyze laminar mixing of inhomogeneous fluids, and testing these against experiments on well-characterized fluids. The microstructure at any point in the fluid is represented by the area tensor, which provides information about the size, shape, and orientation of the microstructure. The area tensor changes over time in response to the local deformation and rotation of the fluid, following a theory is incorporated into a finite element code, which solves simultaneously for pressure, velocity, and the components of the area tensor. Using this approach, engineers will be able to analyze the mixing performance of twin screw extruders and similar devices, which generate complex flow fields. This capability will improve the design and operation of polymer mixing equipment, enable reliable scale-up of the laboratory processes, and improve the quality and consistency of polymer blends and related products.

Tucker-9813020这项研究考察了非均匀液-液体系的混合，如聚合物共混物。 混合决定了这些材料的精细尺度形态及其固态性质。 该项目正在开发分析和数值工具，以分析非均匀流体的层流混合，并通过对具有良好特征的流体的实验来测试这些工具。 流体中任何点的微观结构都由面积张量表示，它提供了有关微观结构的尺寸、形状和方向的信息。 面积张量随着时间的推移而变化，以响应流体的局部变形和旋转，以下理论被纳入有限元代码，同时解决压力，速度和面积张量的分量。使用这种方法，工程师将能够分析双螺杆挤出机和类似设备的混合性能，从而产生复杂的流场。 这种能力将改进聚合物混合设备的设计和操作，使实验室工艺能够可靠地扩大规模，并提高聚合物共混物和相关产品的质量和一致性。