化工学报2012，Vol.63Issue(3)：698-704,7.DOI:10.3969/j.issn.0438-1157.2012.03.004
基于颗粒尺度的离散颗粒传热模型
Heat transfer model for particles with discrete element method
摘要
Abstract
Heat conduction in granular assemblies plays an important role in industrial applications. In this paper, the details of heat transfer mechanism are considered in particle scale. The conduction resistances of solid interior, rough surface, gas film between solids, and gas-gap between contacted surfaces are modeled and coupled with discrete element method to deduce a heat transfer model. Numerical simulations are performed to investigate the effects of particle diameter, specific thermal capacity, thermal conductivity of particles and compressive load on effective thermal conductivity (ETC) in fixed beds. The predicted ETC is compared with experimental and simulated data in literature, indicating that the presented model can predict ETC satisfactorily, which provides a useful tool for studying heat transfer in particle assemblies.关键词
颗粒尺度/离散颗粒模型/传热/固定床Key words
particle scale/discrete element method/heat transfer/fixed beds分类
化学化工引用本文复制引用
卜昌盛,陈晓平,刘道银,段钰锋..基于颗粒尺度的离散颗粒传热模型[J].化工学报,2012,63(3):698-704,7.基金项目
国家自然科学基金项目(50876021,51076030). （50876021,51076030）
