圆筒旋转水流单颗粒受差异旋转惯性力数值模拟

The Numerical Simulation of Single Particle Flow in Cylinder Rotation Under Differential Rotational Inertia Force

研究考虑到物理实验中转速调节的局限,采用DPM模型对圆筒旋转水流内单颗粒运动进行数值模拟,探讨圆筒内单颗粒的运动特性与受力规律。模拟结果表明,单颗粒在旋转圆筒水流内随水流做离心和向心运动时,其所受到的离心力与差异旋转惯性力分别遵循不同的规律。即差异旋转惯性力在低速旋转水流体系中对颗粒运动有一定的影响,在分析旋转水流内颗粒受力时不可忽略。因此具有一定的理论意义与工程设计价值。

Taking the limitations of speed control in the physical experiment into account ,the movement of a single parti-cle within rotational water flow of a cylinder was simulated by using the DPM model ,so as to study the motion character-istics and force law of the single particle in the cylinder .Simulation results showed that the single particle did centrifugal and centripetal movement with the water flow in the cylinder ,and the centrifugal force and differential rotational inertia force it subjected to followed different rules .The differential rotational inertia force had certain influence on the particle movement in low-speed rotational water flow ,which could not be ignored in the analysis .These findings have certain the-oretical significance in the design of engineering projects .