LBE–DEM simulation of inter-phase heat transfer in gas–solid cross jets  

作　　者：Nan Gui Wenkai Xu Liang Ge Jie Yan 

机构地区：[1]Department of Thermal Power Engineering, College of Mechanical and Transportation Engineering, China University of Petroleum [2]China Academy of Space Technology

出　　处：《Chinese Science Bulletin》2014年第20期2486-2495,共10页

基　　金：supported by the National Natural Science Foundation of China (51106180);the China Postdoctoral Science Foundation (2013M540964)

摘　　要：Lattice-Boltzmann equation(LBE)–Discrete element method(DEM)coupled simulation of a twodimensional gas–solid cross jet is performed,focusing on the gas-particle two-way coupling effect on heat transfer characteristics.The Reynolds number is 1000,and particle Stokes numbers are 10,25,and 50 under the same number flow rate of particles.The gas phase temperature field and particle distribution as well as the inter-phase heat transfer characteristics are studied and analyzed.The dominating effects,i.e.the mean temperature difference and mean heat transfer coefficient between the gas–solid phases,for the pre-and post-collision stages of the cross jets are illustrated respectively.The change of dominating roles is related to the dynamical response characteristics of particles.Lattice-Boltzmann equation （LBE）-Discrete element method （DEM） coupled simulation of a two- dimensional gas-solid cross jet is performed, focusing on the gas-particle two-way coupling effect on heat transfer characteristics. The Reynolds number is 1000, and particle Stokes numbers are 10, 25, and 50 under the same number flow rate of particles. The gas phase temperature field and particle distribution as well as the inter-phase heat transfer characteristics are studied and analyzed. The dominating effects, i.e. the mean temperature difference and mean heat transfer coefficient between the gas-solid phases, for the pre- and post- collision stages of the cross jets are illustrated respectively. The change of dominating roles is related to the dynamical response characteristics of particles.

关 键 词：交叉射流 传热系数 气固 平均温度差 粒子分布 模拟 波尔兹曼方程 动态响应特性 

分 类 号：O358[理学—流体力学]