固液两相流中固体颗粒的垂直分选模型  

Modeling of vertical segregation of solid particles in sediment-laden flow

作　　者：倪晋仁[1] 曲轶众[1] 

机构地区：[1]北京大学

出　　处：《水动力学研究与进展（A辑）》2003年第3期349-354,共6页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金资助项目 ( 4 96 2 5 10 1)

摘　　要：在单个固相颗粒运动方程的基础上 ,进一步考虑了多颗粒条件下的颗粒之间的相互作用 ,并通过对液体流动特性的简化考虑 ,建立了固体颗粒在水流中运动的垂直分选模型。本文提出的颗粒分选模型建立在细致分析两相流运动过程中颗粒受力特点的基础上 ,有助于对两相流运动和沉积的各个子过程进行深入的了解 ,可以模拟各种颗粒在固液两相流中的运动过程和最终状态 。A simulation model for vertical segregation of non cohesional particles in solid liquid two phase flow is developed by means of the Lagrangian method incorporating a collisional model for the particle phase and the Eulerian method for the liquid phase. The trajectories of particles can be simulated directly by the Lagrangian method with the consideration of particle particle interactions and simplification of some fluid particle interactions. The model can be used for description of vertical segregation of non uniform particles that was reported in some journals in the field of geo science. Meanwhile, it is helpful to understand the mechanism of particle motion in complicated sediment laden flows. The model presented herein is indirectly tested by some experimental results under simpler conditions and more data is still needed for detailed validation.

关 键 词：固液两相流 固体颗粒 垂直分选模型 流体力学 

分 类 号：O359[理学—流体力学]