Comparison of Heat Transfer in Gravity-Driven Granular Flow near Different Surfaces

作     者：GUO Zhigang TIAN Xing YANG Jian SHI Tuo WANG Qiuwang GUO Zhigang;TIAN Xing;YANG Jian;SHI Tuo;WANG Qiuwang

作者机构：MOE Key Laboratory of Thermo-Fluid Science and EngineeringXi'an Jiaotong UniversityXi'an 710049China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2021年第30卷第2期

页      面：441-450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：The work is financially supported by National Basic Research Program of China(Grant No.2017YFB0603500) the National Nature Science Foundation of China(No.51536007) the Foundation for Innovative Research Groups of the National Natural Science Foundation of China(No.51721004) 

主　　题：gravity-driven granular flow discrete element method(DEM) heat transfer numerical simulation 

摘      要：Heat transfer in gravity-driven granular flow has been encountered in many industrial processes,such as waste heat recovery and concentrated solar *** understand more about Moving Bed Heat Exchanger (MBHE) applied in this field,numerical simulation was carried out for the characteristics of granular flow near different surfaces through discrete element method (DEM).In this paper,both the performances of particles motion and heat transfer were *** s found that,even though the macroscopic granular flow is similar to fluid,there is still obvious discrete nature *** fluctuations of parameters in granular flow are inevitable which is more obvious in the circular tube cases.A special phenomenon,where competition motion is found,is resulted from discrete nature of *** terms of heat transfer,overall heat transfer coefficients for plate are higher than that of tube owing to better contact between particles and ***,due to competition motion,particles in high temperature tend to contact the tube,which is beneficial to heat transfer in some local *** heat transfer characteristics above will also affect the temperature distribution near the outlet of different geometries.