Mixing and Segregation of Powders in Rotating Containers

摘要CTS-9529559 本文将利用运动学和颗粒动力学模拟技术研究旋转容器中颗粒物料的混合和分离机理。 运动学（或“几何学”）研究将提供容器整个体积的一般行为规则。 微变形颗粒的颗粒动力学模拟将导致基于颗粒特性和微观力学流动特性的预测。 将使用小波方法来表征混合程度。 将考虑二维和三维流动情况。 总体目标是识别转鼓中的主要混合和分离机制，定量表征实验室和工业条件下的混合，以及优化混合过程。 由于目前的调查方法主要是经验性的，拟议的项目预计将提供关键的进展，在数学建模和理解的过程，以相关的化工厂，制药，冶金，水泥和聚合物行业。 ***

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. ***