双筒水流中单颗粒差异旋转惯性力的数值模拟

摘要

On the basis of the physical model experiment,using DPM model to simulate the Taylor vortex cell experiments and using Moving Mesh in binoculars and concentric rotating flow simulation,the paper discussed the motion characteristics and force law of single particles. Simulation results show that a)in the rotation system,the smaller the flow rate is,the more obvious trend of single particles centrifugal movement will be;b)When the continuous rotation of the inner cylinder,the outer cylinder is stationary,difference rotational inertia force is less than centrifugal force in numerical,but they belong to the same orders of magnitude and in the same direction,single particle do centrif-ugal movement,when the continuous rotation of the inner cylinder and then still and outer cylinder is stationary,differences in rotational iner-tia force and the centrifugal force are in the opposite direction,differences in rotational inertia force is greater than centrifugal force,both dif-fer an order of magnitude,single particle do centripetal movement;c)Whether the inner cylinder is continuous rotation or stationary after the first rotation,Reynolds gradually decrease and the radial force affects the single particle state of motion.%在实体模型试验的基础上，采用 DPM多相流模型模拟泰勒窝胞试验，并将滑移网格运用于同心双筒旋转水流模拟，对水流中单颗粒的运动进行了数值模拟，探讨了单颗粒的运动特性与受力规律。模拟结果表明：①旋转水流体系中水流速度越小，单颗粒发生离心运动的趋势越明显；②当内筒持续旋转、外筒静止时，差异旋转惯性力在数值上小于离心力，但二者属于同一个数量级且方向相同，单颗粒做离心运动，当内筒持续旋转再静止、外筒静止时，差异旋转惯性力与离心力方向相反，在数值上差异旋转惯性力大于离心力，单颗粒做向心运动；③无论内筒是持续旋转还是先旋转后静止，雷诺数均呈逐渐减小趋势，径向受力影响着单颗粒的运动状态。