Mixing and Segregation of Powders in Rotating Containers

旋转容器中粉末的混合和分离

• 批准号: 9529559
• 负责人: Julio Ottino
• 金额: $ 28.5万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-07-15 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9529559&HistoricalAwards=false
• 关键词: Mixing; Segregation; Powders; Rotating; Containers

ABSTRACT CTS-9529559 Mixing and Segregation mechanisms of granular materials in rotating containers will be investigated by using kinematic and granular dynamics modeling techniques. Kinematic (or " geometrical") investigation will provide generic rules of behavior in the entire volume of a container. Granular dynamics simulations of slightly deformable particles will lead to predictions based on particle properties and micromechanical flow characteristics. A wavelet methodology will be used to characterize the degree of mixing. Both two-and three-dimensional flow situations will be considered. Overall goals are the identification of the dominant mixing and segregation mechanisms in rotating drums, quantitative characterization of mixing in laboratory and industrial conditions, and optimization of mixing processes. Because the current methods of investigation are largely empirical, the proposed project is expected to provide critical advances in the mathematical modeling and understanding of processes to relevance to chemical plants, pharmaceutics, metallurgy, cement and polymer industries. ***

本文将利用运动学和颗粒动力学模拟技术研究CTS-9529559旋转容器内颗粒物料的混合和分离机理。运动学(或“几何学”)研究将提供集装箱整个体积的一般行为规则。对微小变形颗粒的颗粒动力学模拟将导致基于颗粒特性和细观流动特性的预测。将使用小波方法来表征混合程度。二维和三维流动情况都将被考虑。总体目标是确定旋转转鼓中的主要混合和分离机制，实验室和工业条件下混合的定量表征，以及混合过程的优化。由于目前的调查方法在很大程度上是经验性的，拟议的项目预计将在数学建模和理解与化工厂、制药、冶金、水泥和聚合物行业相关的过程方面取得重大进展。***