Material Instabilities in Particulate Systems

颗粒系统中的材料不稳定性

• 批准号: 9510121
• 负责人: Joe Goddard
• 金额: $ 27万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-04-15 至 2000-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9510121&HistoricalAwards=false
• 关键词: Material; Instabilities; Particulate; Systems

Abstract CTS-9510121 Fluid-particle mixture and granular flow instabilities will be investigated. The dilatational and shearing instabilites of spatially homogeneous processes in slow sharing movement of granular media and suspensions will be studied using a computer simulation technique. The results will be tested in an experiment using the index of refraction matched, photochromatic tracer particle method. The stability of granular flow, including clustering, in the Bagnold grain-inertia regime will analyzed by using both kinetics theory and continuum mechanics. Understanding instabilities in suspension and granular flows is a critical aspects of the multiphase flow theory. It has important applications in the design of industrial equipment handling solids and in the analysis of geotechnical phenomena. ***

摘要CTS-9510121 将研究流体-颗粒混合物和颗粒流的不稳定性。 本文将用计算机模拟技术研究颗粒介质和悬浮液在空间均匀过程中的剪切不稳定性和剪切不稳定性。 结果将在实验中使用折射率匹配，光致变色示踪粒子方法进行测试。 在Bagnold颗粒惯性区，颗粒流的稳定性，包括聚集，将用动力学理论和连续介质力学分析。 了解悬浮液和颗粒流的不稳定性是多相流理论的一个重要方面。 它在处理固体的工业设备的设计和岩土工程现象的分析中有重要的应用。 ***