CAREER: Non-equilibrium Dynamics of Thin Fluidized Granular Media

urbach9875529这是一个凝聚态物理职业项目。研究了受激颗粒介质的非平衡动力学，重点研究了在垂直振动的平板上几乎相同的单层球体。这个简单且易于控制的系统表现出丰富多样的合作现象，将使用计算机成像技术进行定量研究。将直接测量非平衡颗粒流体的动力学理论所必需的统计分布和相关函数。将研究层内粒子、能量和动量的输运，并与动力学理论预测的行为进行比较。此外，将研究系统的新集体行为，以发展和测试“颗粒热力学”理论。这些结果将提供对颗粒介质动力学的更深入的理解，这是朝着改进各种重要工业过程模型的重要一步。这些概念简单但视觉上引人注目的实验将被用于增加物理专业学生的数量和质量，方法是将其纳入统计力学课程，并在社区的当地高中进行巡回演出。%%%这是一个凝聚态物理职业项目。该研究涉及大量几乎相同的球形粒子在振动板上的行为。这个简单且易于控制的系统显示了粒子间碰撞过程中能量损失产生的丰富多样的令人惊讶的现象。这种行为将使用计算机成像技术进行定量研究。将单个颗粒的统计行为与颗粒集合的平均特性联系起来的理论将得到发展和测试。这些结果将提供对颗粒介质动力学的更深入的理解，这是改进各种重要工业过程模型的重要一步，包括谷物和粉末的运输和加工，以及石油加工中使用的气体流化床。这些概念简单但视觉上引人注目的实验将通过纳入本科课程来增加物理专业的数量和质量，并将在社区的当地高中进行巡回演出。

Urbach9875529This is a Condensed Matter Physics CAREER project. The research deals with non-equilibrium dynamics of excited granular media, focusing on a monolayer of nearly identical spheres on a flat plate vibrating vertically. This simple and easily controllable system exhibits a rich variety of cooperative phenomena which will be quantitatively investigated using computer imaging techniques. Direct measurements of the statistical distribution and correlation functions necessary for the construction of a kinetic theory of the non-equilibrium granular fluid will be made. Transport of particles, energy , and momentum in the layer will be studied and compared with the behavior predicted from the kinetic theory. In addition, the novel collective behavior of the system will be studied to develop and test theories of `granular thermodynamics'. These results will provide a deeper understanding of the dynamics of granular media, an essential step towards improved models of a wide range of important industrial processes. These conceptually simple but visually striking experiments will be used to increase the number and quality of physics majors through incorporation into a statistical mechanics course and a travelling show to be taken to local high schools in the community.%%% This is a Condensed Matter Physics CAREER project. The research deals with the behavior of a large number of nearly identical spherical particles on a vibrating plate. This simple and easily controllable system exhibits a rich variety of surprising phenomena that arise from the energy lost during inter-particle collision. The behavior will be quantitatively investigated using computer imaging techniques. Theories that relate the statistical behavior of individual grains to the average properties of the collection of grains will be developed and tested. These results will provide a deeper understanding of the dynamics of granular media, an essential step towards improved models of a wide range of important industrial processes, including transport and processing of grains and powders, and gas fluidized beds used in petroleum processing. These conceptually simple but visually striking experiments will be used to increase the number and quality of physics majors through incorporation into undergraduate courses, and a traveling show to be taken to local high schools in the community.