A DEM-based heat transfer model for the evaluation of effective thermal conductivity of packed beds filled with stagnant fluid: Thermal contact theory and numerical simulation

doi:10.1016/j.ijheatmasstransfer.2018.12.005

CORC > 合肥物质科学研究院 > 中国科学院合肥物质科学研究院 > 中科院等离子体物理研究所

	A DEM-based heat transfer model for the evaluation of effective thermal conductivity of packed beds filled with stagnant fluid: Thermal contact theory and numerical simulation
	Chen L(陈磊)1; Wang C(王聪)1,2; Moscardini, Marigrazia 3; Kamlah, Marc 3; Liu SL(刘松林)1
刊名	International Journal of Heat and Mass Transfer
	2019-04-01
DOI	10.1016/j.ijheatmasstransfer.2018.12.005
英文摘要	The Effective thermal conductivity (k_eff) is one of the key thermal properties for packed beds in the presence of a stagnant fluid. In this study, a thermal discrete element model (DEM) based on the original Cheng-Yu-Zulli analytical model for mono-sized packed beds has been improved and implemented especially for mixed beds of different particle sizes or materials. In order to perform the DEM simulation for packed beds, a thermal contact theory considering three heat transfer mechanisms (solid contact conduction, solid-fluid-solid conduction and radiation) was derived and applied in the network of Voronoi cells obtained by radical Voronoi tessellation of the relevant beds. The numerical model was validated through a comparison with experimental results already reported in literature and a good prediction for the effective thermal conductivity was obtained for both mono-sized and multi-sized packed beds in a wide range of solid-to-fluid conductivity ratio. The model also showed a good performance to study the heat flow distribution as well as the coupled thermo-mechanical behavior of packed beds.
语种	英语
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/42717]
专题	合肥物质科学研究院_中科院等离子体物理研究所
通讯作者	Liu SL(刘松林)
作者单位	1.Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), Hefei, Anhui 230031, China 2.University of Science and Technology of China, Hefei, Anhui 230027, China 3.Institute for Applied Materials (IAM-WBM), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
推荐引用方式 GB/T 7714	Chen L,Wang C,Moscardini, Marigrazia,et al. A DEM-based heat transfer model for the evaluation of effective thermal conductivity of packed beds filled with stagnant fluid: Thermal contact theory and numerical simulation[J]. International Journal of Heat and Mass Transfer,2019.
APA	Chen L,Wang C,Moscardini, Marigrazia,Kamlah, Marc,&Liu SL.(2019).A DEM-based heat transfer model for the evaluation of effective thermal conductivity of packed beds filled with stagnant fluid: Thermal contact theory and numerical simulation.International Journal of Heat and Mass Transfer.
MLA	Chen L,et al."A DEM-based heat transfer model for the evaluation of effective thermal conductivity of packed beds filled with stagnant fluid: Thermal contact theory and numerical simulation".International Journal of Heat and Mass Transfer (2019).