CAREER: Non-equilibrium Dynamics of Thin Fluidized Granular Media

Urbach9875529这是一个凝聚态物理职业项目。这项研究涉及激发颗粒介质的非平衡动力学，集中在平板上垂直振动的几乎相同的球体的单层上。这个简单且易于控制的系统展示了丰富多样的合作现象，将使用计算机成像技术对其进行定量研究。我们将直接测量建立非平衡颗粒流体动力学理论所需的统计分布和关联函数。将研究粒子、能量和动量在层中的传输，并将其与运动学理论预测的行为进行比较。此外，还将研究该系统的新集体行为，以发展和检验“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，这是朝着改进广泛的重要工业过程的模型迈出的重要一步。这些概念简单但视觉上引人注目的实验将被用来增加物理专业的数量和质量，方法是将其纳入统计力学课程和巡回表演，并带到社区的当地高中。%这是一个凝聚态物理职业项目。这项研究涉及大量几乎相同的球形粒子在振动板上的行为。这个简单且容易控制的系统展示了大量令人惊讶的现象，这些现象源于粒子间碰撞过程中损失的能量。这种行为将使用计算机成像技术进行定量研究。将开发和测试将单个谷物的统计行为与谷物集合的平均属性相关联的理论。这些结果将加深对颗粒介质动力学的理解，这是朝着改进一系列重要工业过程的模型迈出的重要一步，包括颗粒和粉末的运输和加工，以及石油加工中使用的气体沸腾床。这些概念简单但视觉上引人注目的实验将被用来通过融入本科课程来增加物理专业的数量和质量，并将在社区内的当地高中巡回演出。

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.