应用离散单元法对二维流化床内流态进行数值模拟研究  

Numerical study of 2D fluidized bed with the distinct element method

作　　者：黎明[1] 谢灼利[1] 张政[1] 

机构地区：[1]北京化工大学化学工程学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2002年第2期6-10,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：中国石油化学工业总公司资助项目 (X5 990 15 )

摘　　要：采用基于颗粒轨道模型的欧拉 拉格朗日数值模拟方法 ,将广泛应用于岩土力学中的离散单元法DEM(DistinctElementMethod)引入流体力学中以计算颗粒与颗粒之间的作用力 ,同时考虑颗粒与流体间的相互作用(双向耦合 ) ,对二维流化床进行数值模拟 ,结果与实验观察到的现象基本一致 。Distinct element method (DEM) attached in a Eulerian-Lagrangian model is used to numerically simulate a 2D fluidized bed performance in this paper, in which DEM is introduced to consider the interaction between particles, and the two way coupling effect between particles and gas are considered in the Eularian Lagrangian model for both phases. The numerically predicted fluid patterns at different inlet gas velocities are similar to the phenomena observed in the literates by experiments. This indicates that DEM has wide prospects in numerical simulation of the dense solid gas or solid liquid flow.

关 键 词：数值模拟 密相气固两相流 离散单元法 流化床 欧拉-拉格朗日模型 

分 类 号：O359[理学—流体力学] TK222[理学—力学]