Numerical investigation of transient gas–solid heat transfer in a packed bed:Impact of intra-particle thermal diffusion

作     者：Hanqiao Che Yuanhe Yue Zhaohua Jiang Duan Li Hanqiao Che;Yuanhe Yue;Zhaohua Jiang;Duan Li

作者机构：School of Mechanical EngineeringGuangxi UniversityNanningGuangxi530004China School of Chemical EngineeringUniversity of BirminghamBirminghamB152TTUK Hebei Engineering Research Center of Advanced Energy Storage Technology and EquipmentSchool of Energy and Environmental EngineeringHebei University of TechnologyTianjin300401China Hebei Key Laboratory of Thermal Science and Energy Clean UtilizationSchool of Energy and Environmental EngineeringHebei University of TechnologyTianjin300401China School of Mechatronics and Vehicle EngineeringChongqing Jiaotong UniversityChongqing400074China School of Instrumentation and Opto-Electronic EngineeringBeihang UniversityBeijing 100191China 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2024年第90卷第7期

页      面：404-411页

核心收录：

学科分类：080701[工学-工程热物理] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：National Natural Science Foundation of China(grant No.51906011) Fundamental Research Funds for the Central Universities(grant No.YWF-23-L-1151) 

主　　题：Packed bed Intra-particle heat transfer CFD–DEM 

摘      要：The transient heat transfer behaviours in a packed bed have been studied using coupled computational fluid dynamics(CFD)and discrete element method(DEM).Intra-particle thermal diffusion,which is a crucial but rarely explored issue,is considered by introducing a one-dimensional diffusion equation in the DEM *** achieve a sufficiently long physical time of simulations,we further reduce the computational cost by applying periodic boundary condition to a small segment of the packed *** study demonstrates a shifting peak heat flow rate from the bottom to the top of the packed bed during the initial warming *** affirm that the influence of thermal diffusion within a particle is noteworthy only for particles exhibiting a high Biot number(e.g.,Bi=1.2).This insight enriches our understanding of heat transfer mechanisms in packed beds and their practical engineering applications.