基于虚拟区域法的竖槽内液固两相流化过程研究  

NUMERICAL SIMULATION OF LIQUID-SOLID FLUIDIZED FLOW WITH FICTITIOUS DOMAIN METHOD

作　　者：陈丽华[1] 金晗辉[1] 余钊圣[1] 陈臻[1] 

机构地区：[1]浙江大学工程力学系,浙江杭州310027

出　　处：《工程力学》2011年第11期17-22,共6页Engineering Mechanics

基　　金：浙江省自然科学基金项目(Y7080318)

摘　　要：该文应用分布式拉格朗日乘子/虚拟区域法对竖槽底部均匀排列的颗粒在液体内的流化过程进行了直接数值模拟,得到了流化过程中流场压力和速度矢量分布,颗粒的流化过程、位置分布和速度矢量分布等,分析了流场压力曲线和速度曲线的阶梯状分布与颗粒分布的关系,探讨了颗粒相流化过程中位置及速度分布随时间的变化。The main purpose of this study is to simulate the fluidization mechanism of solid particles in a twodimensional duct with the distributed Lagrange multipliers/fictitious domain method. The general characteristics of liquid and particles＇ distribution and movement were obtained, including the velocity, pressure and vorticity, as well as the curve of the related pressure and velocity. It is also observed that the particles tend to gather to clusters, partly due to the low flow velocity in the wake induced by upper stream particles. The method was found to work well for simulating the dense fluidized multiphase flow.

关 键 词：液固两相流 数值模拟 拉格朗日乘子/虚拟区域法 流化 聚团 

分 类 号：O359.1[理学—流体力学]