Numerical investigations on gas-solid flow in circulating fluidized bed risers using a new cluster-based drag model

作     者：Zeneng Sun Chao Zhang Jesse Zhu Zeneng Sun;Chao Zhang;Jesse Zhu

作者机构：Department of Chemical and Biochemical Engineering.The University of Western OntarioLondonOntarioN6A 3K7Canada Department of Mechanical and Materials EngineeringThe University of Western OntarioLondonOntarioN6A 3K7Canada 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2022年第20卷第4期

页      面：9-23页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

主　　题：Drag model Clustering effect Gas-solid flow structures Circulating fluidized bed 

摘      要：A cluster-based drag model is proposed for the gas-solid circulating fluidized bed(CFB)riser by including the cluster information collected from image processing and wavelet analysis into the calculation of system *** performance of the proposed drag model is compared with some commonly used drag models.A good agreement with the experimental data is achieved by the proposed cluster-based drag *** analysis of the proposed cluster-based drag model based on the local distributions of solids holdup and particle velocity is *** clustering phenomenon in the low-density and high-density CFB risers and the effect of the cluster size on the simulation accuracy are also numerically studied by the proposed drag model.