REU Supplement: Beds of Particles Fluidized by Liquids

本项目是对流化床进行实验和分析。 要研究的主题是尾流和旋转夫妇， 流化的基本机理.最大流化速率的测定 流化颗粒在床中的可能排列; 稳定横流阵列的实验和数值研究 局限于二维运动的球体; 基于经验的流化床有效密度理论 悬浮和分解力的一个粒子到 浮力加阻力;非线性的实验验证 特别注意平滑的运动波理论 稀疏波和压缩波的冲击 Richardson和Zaki指数;以及 向聚集流化的转变（形成气泡） 基于Foscolo和Gibilaro最近工作的概括， 以及实验测试。 这些实验将 基于几个返回的结构和仪器 流动流化柱。 柱的构造应使 差距尺寸可以改变。 最小的间隙将限制 粒子的二维运动 仪表 是基于柯达自旋物理高速视频， 运动分析系统 这个视频与其他视频不同， 它是基于数字成像，并有一个规定， 与计算机连接。 因此，人们可能需要的数据 图像的解释实际上是在数字化的 适用于直接统计分析。

This project is for experiments and analysis of fluidized beds. The topics to be studied are wakes and turning couples as fundamental mechanisms of fluidization; determination of the most probable arrangements of fluidized particles in a bed; experimental and numerical studies of stable cross-stream arrays of spheres confined to move in two dimensions; development of an empirically based theory of the effective density of a fluidized suspension and the decompositions of the force on a particle into buoyancy plus drag; experimental verification of the nonlinear theory of kinematic waves with particular attention to smoothing and shocking of rarefaction and compression waves as a function of the Richardson and Zaki exponent; and the analysis of transitions to aggregative fluidization (formation of bubbles) based on generalizations of recent work of Foscolo and Gibilaro, together with experimental tests. The experiments are to be based on the construction and instrumentation of several return flow fluidization columns. The columns shall be constructed so that the gap size can be changed. The smallest gap will confine the motion of particles to two dimensions. The instrumentation is to be based on the Kodak Spin Physics high speed video and motion analysis system. This video is different than others in that it is based on digital imaging and there is a provision for interfacing with a computer. Hence, the data one might want for the interpretation of images is actually available in a digitized form suitiable for direct statistical analysis.