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

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

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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 solver.To 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 bed.Our study demonstrates a shifting peak heat flow rate from the bottom to the top of the packed bed during the initial warming phase.We affirm that the influence of thermal diffusion within a particle is note-worthy only for particles exhibiting a high Biot number(e.g.,Bi=1.2).This insight enriches our un-derstanding of heat transfer mechanisms in packed beds and their practical engineering applications.

Packed bedIntra-particle heat transferCFD-DEM

Hanqiao Che、Yuanhe Yue、Zhaohua Jiang、Duan Li

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School of Mechanical Engineering,Guangxi University,Nanning,Guangxi,530004,China

School of Chemical Engineering,University of Birmingham,Birmingham,B15 2TT,UK

Hebei Engineering Research Center of Advanced Energy Storage Technology and Equipment,School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin,300401,China

Hebei Key Laboratory of Thermal Science and Energy Clean Utilization,School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin,300401,China

School of Mechatronics and Vehicle Engineering,Chongqing Jiao tong University,Chongqing,400074,China

School of Instrumentation and Opto-Electronic Engineering,Beihang University,Beijing 100191,China

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National Natural Science Foundation of ChinaFundamental Research Funds for the Central Universities

51906011YWF-23-L-1151

2024

10.1016/j.partic.2024.01.007

颗粒学报(英文版)
中国颗粒学会　中国科学院过程工程研究所

颗粒学报(英文版)

CSTPCD
影响因子：0.632
ISSN：1674-2001
年,卷(期)：2024.90(7)