高浓度颗粒气固两相流动的二阶矩模型的数值模拟  

Second order moments model and numerical simulation ofdense gas-solid two-phase flow

作　　者：Namory Camara 陆慧林[1] 赵云华[1] 刘文铁[1] 李响[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001

出　　处：《哈尔滨工业大学学报》2006年第11期2015-2018,共4页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(50376013)

摘　　要：采用动理学方法,用各向异性的M axwell颗粒速度分布函数,建立颗粒相Boltzm ann方程,分别取零次矩、一次矩和二次矩得到颗粒相连续方程、动量方程和二阶矩方程.模拟计算得到上升管内颗粒流场分布和脉动速度分布,与实验结果比较表明:各向异性颗粒动理学能够反映颗粒流动特性,从而能够更全面地认识高颗粒浓度气固两相流动过程.Kinetic theory of granular flow that was wide used in theoretical studies of gas-solid two-phase flow is based on non-uniform dense gases molecular dynamics. The conservation eqt,ations of solid phase were derived from the assumption of isotropic Maxwell velocity distribution simulating particle flow to molecular motion. However, particle velocity distribution is anisotropic due to energy dissipation by particle collisions. Based on kinetic theory of molecular dynamics, Bohzmann equation of velocity fluctuation of particles was established under the assumption of anisotropic Maxwell velocity distribution. The mass, momentum and energy equations were obtained by taken from first and second orders moments. Particle flow behavior and fluctuating velocity distribution of particles were simulated, and compared with experiments. Simulations indicated that the anisotropic kinetic theory of granular flow fully expressed flow behavior of particles, and processes of dense gas-solid flow.

关 键 词：各向异性 二阶矩模型 颗粒动理学 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]