颗粒-气体脉动速度联合PDF输运方程的封闭  

A joint PDF transport equation for particle-fluid fluctuation velocity in two-phase flows

作　　者：赵海波[1] 柳朝晖[1] 郑楚光[1] 陈小华[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室

出　　处：《华中科技大学学报（自然科学版）》2003年第4期56-58,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家重点基础研究专项经费资助项目 (G1 9990 70 1 2 )

摘　　要：在建立的颗粒 气体微团脉动速度联合PDF输运方程基础上 ,考虑到颗粒的扩散存在轨道穿越效应、连续性效应和惯性效应以及湍流的各向异性 ,应用三涡相互作用模型来封闭颗粒所见气体微团脉动速度的朗之万方程中的漂移系数 ,并应用各向异性的扩散矩阵封闭了此朗之万方程中的扩散系数 .完成了整个PDF输运方程的完全封闭 ,此输运方程可以用来模拟湍流气固 (液 )Considering the inertia effect, the crossing trajectories effect and the continuity effect of finite inertia particle dispersion and the anisotropy of turbulent flows, three eddy interaction model was used to close the drift coefficient of the Langevin equation of fluid fluctuation velocity seen by particles, and a non isotropic diffusion matrix was used to close the diffusion coefficient of the Langevin equation. In this way the transport equation was completely closed. The joint PDF transport equation can be used in simulating gas solid (liquid) two phase turbulent flows.

关 键 词：两相流 概率密度函数 朗之万方程 扩散系数 漂移系数 颗粒-气体脉动速度联合PDF输运方程 

分 类 号：O359[理学—流体力学]