CAREER: Mixing and Segregation in Single and Multi- Component Assemblies of Granular Material Subject to Vibration

摘要目的是研究单组分和多组分颗粒混合物在垂直和水平振动下对正弦和随机振动剖面的混合和分离。这项工作将包括利用高速视频和数字图像处理来确定粒子速度场和混合浓度的实验，用于研究各种参数和环境影响的三维离散单元计算机模拟，以及基于几何参数和动力学理论的分析方法来模拟材料响应。拟议的教育计划将包括开设一门有关粒子科学与技术的课程。当地产业和其他大学的参与将是课程的一个关键方面。此外，将鼓励关注微粒工程问题的本地公司参加现有的高级“顶点”设计课程。用于展示基本工程概念的基于java的计算机可视化工具也将作为教育计划的一部分进行开发。这些工具将导致更有效的课堂教学和更好的学生理解的关键概念。万维网网页也将被开发以补充课堂主题。如果成功的话，所提出的研究结果将更好地理解和教育混合和分离过程的基本机制，并可能导致在处理颗粒的工业中改进运输、混合和分离材料的设计。＊＊＊

CTS-9733876 Wassgren, Carl Clemson University Abstract The objective is to investigate mixing and segregation of deep beds of single- and multi-component particulate mixtures in response to vertical and horizontal vibrations with sinusoidal and random oscillation profiles. The work will consist of experiments utilizing high speed video and digital image processing for determining particle velocity fields and mixing concentrations, three dimensional discrete element computer simulations for investigating the effects of various parameters and environments, and analytical methods based on geometric arguments and kinetic theory for modeling the material response. The proposed educational program will include the development of a course concerning particle science and technology. Involvement of local industries and other universities will be a key aspect of the course. Additionally, local companies concerned with particulate engineering issues will be encouraged to participate in the existing senior level "capstone" design course. Java-based computer visualization tools for presenting fundamental engineering concepts will also be developed as part of the educational program. These tools will result in more efficient class room instruction and better student comprehension of critical concepts. World Wide Web pages will also be developed to supplement in-class topics. If successful, the results of the proposed research will provide a better understanding and education of the fundamental mechanisms involved in mixing and segregation processes and may lead to improved designs for transporting, blending, and separating materials in industries handling particulates. ***