化工学报2016，Vol.67Issue(8)：3321-3330,10.DOI:10.11949/j.issn.0438-1157.20160440
基于DEM模拟气固循环流化床提升管内颗粒聚团特性
DEM simulation of particle clustering characteristics in gas-solid CFB risers
摘要
Abstract
Gas-solid flow in CFB riser was simulated by a combined approach of computational fluid dynamics (CFD) and discrete element method (DEM). A new cluster analysis method based on image calibration and processing technique was developed to obtain overall, axial and radial distributions of clusters in fluidized beds as well as cluster characteristics in terms of inclination angle, degree of sphericity, and aspect ratio of long over short axis. The clusters showed a wide distribution with mainly small clusters and large clusters formed in the regions near the wall. Along the height direction of the riser, the amount of clusters first increased and then gradually decreased. In addition, clusters were most likely to exist in the form of non-spherical aggregates with large inclination angle and aspect ratio between 2 and 4.关键词
流化床/多相流/计算流体力学/DEM/颗粒聚团Key words
fluidized-bed/multiphase flow/computational fluid dynamics/DEM/cluster分类
化学化工引用本文复制引用
吴迎亚,彭丽,和宁宁,高金森,蓝兴英..基于DEM模拟气固循环流化床提升管内颗粒聚团特性[J].化工学报,2016,67(8):3321-3330,10.基金项目
国家重点基础研究发展计划项目（2012CB215003）；国家自然科学基金项目（91334104）。Foundation item:supported by the National Basic Research Program of China(2012CB215003) and the National Natural Science Foundation of China (91334104) （2012CB215003）
