考虑颗粒碰撞的三维混合层直接数值模拟  

DIRECT NUMERICAL SIMULATION OF THE THREE-DIMENSIONAL PLANE MIXING LAYER CONSIDERING INTER-PARTICLE COLLISION

作　　者：陈鑫蔚[1] 樊建人[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室

出　　处：《工程热物理学报》2010年第8期1327-1330,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金重点项目(No.50736006)

摘　　要：为了更细致地考察两相流动中颗粒间的碰撞现象及颗粒碰撞对颗粒相、流体相产生的具体影响,本文在双向耦合、颗粒St=3、满质量载荷工况下对气固两相三维平面混合层流场进行了直接数值模拟。其中对颗粒跟踪采用Lagrangian方法,颗粒间的碰撞采用硬球模型。数值结果表明：考虑了颗粒间的碰撞后,在流场发展末期,颗粒分布得更加均匀,流体相相互混合程度提高,两相平均流向速度降低,湍动能增强。To investigate the behavior of inter-particle collision and its effects on fluid phase and particle phase,direct numerical simulation of a three-dimensional gas-solid two-phase plane mixing layer under the two-way coupled case,for the particles with Stokes number of 3,at mass loading of 1 was conducted.Lagrangian method is used to trace the particles and the deterministic hard-sphere model was used to describe the inter-particle collision.The results show that the particle distribution is more uniform,the mixture of gas and turbulence kinetic energy of fluid phase and particles were strengthened,but the mean streamwise velocity of fluid phase and particle phase due to the inter-particle collision.

关 键 词：颗粒碰撞 硬球模型 气固两相混合层 直接数值模拟 双向耦合 

分 类 号：O357.5[理学—流体力学]