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直接模拟蒙特卡罗方法研究循环流化床内颗粒聚团的流动
Clusters Flow in Circulating Fluidized Bed Simulated by Direct Simulation Monte Carlo Approach
【Author】 LIU Huan-peng, LIU Wen-tie, LUHui-lin, SHEN Zhi-heng, HE Yu-rong (School of Energy Science and Engineering, Harbin Institute of Technology, Harbie, Heilongjiang 150001, China)
【机构】 哈尔滨工业大学能源科学与工程学院；
【摘要】 采用直接模拟蒙特卡罗方法(DSMC)模拟颗粒间的碰撞,用Lagrangian方法计算颗粒的运动.采用考虑颗粒脉动流动对气相湍流流动影响的大涡模拟(LES)研究气相湍流.数值模拟垂直管道内气固两相上升流动,对管内气相速度和颗粒相速度、浓度,以及聚团流动进行分析,得到气固两相上升流中颗粒流动的有关信息.
【Abstract】 A discrete particle modon-collision decoupled model has been developed. Particle collision is modeled by means of the direct simulation Monte Carlo (DSMC) approach. The large eddy simulation accounting on the effect of particle fluctuation is used to model gas turbulent flow. The Newtonian equations of motion are solved for each individual particle using Lagranian approach. Numerical simulations of paniculate fluidization behavior are performed in a circulating fluidized bed. The velocity distributions of gas and particles phases, concentrations and information of cluster motions are obtained.
【Key words】 DSMC approach； LES model； discrete particle motion-collision decoupled model； numerical simulation；
- 【会议录名称】 中国颗粒学会2004年年会暨海峡两岸颗粒技术研讨会会议文集
- 【会议名称】中国颗粒学会2004年年会暨海峡两岸颗粒技术研讨会会议
- 【会议时间】2004-08
- 【会议地点】中国山东烟台
- 【分类号】O354
- 【主办单位】中国颗粒学会