液-固两相流的运动描述与数值模拟

Motion description and numerical simulation of fluid-solid two-phase flows

提出一种数值方案,模拟颗粒状固体在液体中沿一条水平管道的流动.粒子的运动和液体的速度场,是通过一个应用程序交替计算而确定的,即对所有单个粒子的运动应用牛顿定律得到盘状颗粒物的轨迹,求解Navier-Stokes方程得到液速场.利用本文模型及数值模拟方案,可以在计算机屏幕上直观地显示出每一个粒子的流动.

In this paper, we present a numerical technique for simulating the flow of granular solids in fluids through a horizontal channel. The motion of particles and the velocity field of the fluid are determined through a process in which computations alternate between the application of Newton＇s law to the discs tracing the motion of all the individual particles and the solution of the Navier-Stokes equations finding the velocity field of fluid. A numerical scheme,based on the model presented,the flow of each individual particle can be disphyed graphically in computer screens once numerical simulation starts.