突扩圆管内液-固两相流固体颗粒运动特性的DPM数值模拟  

NUMERICAL SIMULATION ON SOLID PARTICLE MOVEMENT CHARACTERS OF LIQUID-SOLID TWO PHASE FLOW IN SUDDEN EXPANSION PIPE BY DISCRETE PARTICLE MODEL

作　　者：李国美[1] 王跃社[1] 亢力强[2] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049 [2]中国科学院力学研究所,北京100190

出　　处：《工程热物理学报》2008年第12期2061-2064,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金委创新研究群体基金资助(No．5052160450323001);国家自然科学基金委重点资助(No．50536020)

摘　　要：采用考虑颗粒碰撞的欧拉-拉格朗日数值模拟方法(DPM),对水平突扩圆管中液固两相流固体颗粒的碰撞过程进行了数值计算。在模型中,对液相采用欧拉法建立控制方程,对离散颗粒采用拉格朗日方法模拟。采用硬球模型描述颗粒间的碰撞作用。计算结果表明,该模型可以真实地模拟液固两相流中固体颗粒运动的动态变化过程以及颗粒的非均匀分布特征,从单颗粒层次上提供颗粒的运动信息,这有助于深入研究液固两相流中固体颗粒的运动规律。Numerical simulation of solid particle collision process of liquid-solid two phase flow in horizontal sudden expansion pipe was performed with Eulerian-Lagrangian model（DPM）. In this model, governing equations of liquid were established with Eulerian approach, and discrete particle phase was simulated through Largrangian method. The hard sphere model was used to describe inter-particle collisions. The results showed that the model could really simulate the dynamic process of particles and their unequal distribution characteristics. At the same time, the model can provide detailed moving information of each particle. These may be helpful to reveal the movement characters of solid particle in liquid-solid two phase flow.

关 键 词：欧拉-拉格朗日方法 硬球模型 液固两相流 碰撞 

分 类 号：TK124[动力工程及工程热物理—工程热物理]