CFD-DEM-VDGM method for simulation of particle fluidization behavior in multi-ring inclined-hole spouted fluidized bed

作     者：Meng Chen Zhao Chen Ming Gong Yaping Tang Malin Liu Meng Chen;Zhao Chen;Ming Gong;Yaping Tang;Malin Liu

作者机构：Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijing 100084China School of Chemical EngineeringNorthwest UniversityXi’an 710069China 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2021年第19卷第4期

页      面：112-126页

核心收录：

学科分类：081203[工学-计算机应用技术] 08[工学] 0835[工学-软件工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：The authors would like to thank the National Natural Science Foundation of China(Grant Nos.91634113 and 21306097) the National Major Science and Technology Projects of China(No.ZX06901)for the financial support provided 

主　　题：Virtual dual-grid model CFD-DEM-VDGM Spouted fluidized bed Unstructured grids Particle fluidization 

摘      要：The simulation of particle fluidization behavior in a complex geometry with a large number of particles is challenging owing to the complexity of unstructured computational grids and high computational *** this study,a virtual dual-grid model(VDGM)is proposed to calculate the solid volume fraction in unstructured grids and speed up the *** VDGM is coupled with a computational fluid dynamics-discrete element method model to simulate particle fluidization behavior in a multi-ring inclined-hole spouted fluidized bed with 4.2 million particles under a high temperature of 1423 K.A computational fluid dynamics-discrete element method-virtual dual-grid model(CFD-DEM-VDGM)coupling model is implemented based on commercial software Fluent and *** time step settings in Fluent and EDEM and the pattern of particle data transfer in Fluent are improved to speed up the *** is discovered that the VDGM can calculate the solid volume fraction in unstructured grids of complex geometry and speed up the calculation *** calculation speed increased by more than 10 times compared with that of the segmentation sampling *** new pattern of particle data transfer in Fluent can reduce data transfer time by more than 90%.The fluidization behavior of 4.2 million high-density particles in the multi-ring inclined-hole spouted fluidized bed is obtained and analyzed in *** CFD-DEM-VDGM coupling method is validated for the bed expansion height and spouting cycle time in a spouted fluidized bed via experimental results.