深海采矿垂直管道内异形粗颗粒运动状况研究

Motion of Irregular Coarse Particles in Vertical Pipelines During Deep Sea Mining

运用计算流体力学-离散元(CFD-DEM)方法对不同工况下球形、四面体形和六面体形颗粒群在垂直管流中的运动状况进行仿真分析,得到异形颗粒群垂直管道内的运动状况。对比分析了异形颗粒群在垂直管道中的局部浓度和局部流量,结果表明,入口流速较低时,颗粒形状对局部浓度影响较大;给料浓度较大、入口流速较低时,颗粒形状对局部流量的影响明显。

The motion of spherical,tetrahedral and hexahedral particles flowing in a vertical pipe under different working conditions was simulated by using computational fluid dynamics⁃discrete element method(CFD⁃DEM),and the motion of irregular particles flowing in a vertical pipe was obtained.Based on comparison of local concentration and local flow rate,it is found that with lower flow rate at the inlet,the shape of particles can bring a larger influence to local concentration;while with a higher feed concentration and lower inlet flow rate,the shape of particles can bring obvious influence to local flow rate.