矿石颗粒在Poiseuille流中的运动数值模拟

Numerical Investigation of Motion of Ore Particlesin Poiseuille flow

深海采矿一般采用水力提升方式将海底矿石输送到水面.矿石颗粒在管道内上升水流中的运动特性研究是水力提升系统设计的基础.论文采用计算流体力学（Computational Fluid Dynamics,CFD）方法,研究大密度的矿石颗粒在垂直管道内Poiseuille流中的运动及流场特性.釆用大祸模拟（Large Eddy Simulation,LES）方法模拟矿石颗粒周围的流场,计算矿石颗粒受到的流体力;采用六自由度（Six-degree-of-freedom,6-DOF）运动求解器计算颗粒在管道中的运动特性.研究发现,颗粒密度是影响颗粒在管道Poiseuille流中运动的重要因素;颗粒释放位置对颗粒的最终运动状态影响较小;不同提升速度下,颗粒在管道Poiseuille流中呈现不同的运动状态.论文分析结果可为深海采矿水力提升系统设计和机理研究提供参考.

Hydraulic lifting is a typical way to transport ores in deep sea mining. Numerical simulation of ore particles in Poiseuille flow in a vertical tube is carried out with computational fluid dynamics （CFD） method. The flow field is modeled with Large Eddy Simulation （LES） method, whereas the particle motion is calculated with the six-degree-of-freedom （6-DOF） motion solver. Density of the particle is a main factor which influences the motion of the particle in Poiseuille flow, but release has little effect on the position of the particle. Different path regimes can be found under different upward flow velocities. The results of this article can provide reference for the design of the hydraulic lifting pipe.