矿产保护与利用2025，Vol.45Issue(1)：15-22,8.DOI:10.13779/j.cnki.issn1001-0076.2025.01.001
基于DEM-CFD的立式搅拌磨机耦合仿真方法及实验研究
Coupling Simulation Method and Experiment of Vertical Stirring Mill Based on DEM-CFD
摘要
Abstract
A coupling simulation method and experiment based on DEM-CFD were investigated to address the complex multi-phase coupling motion of spiral agitators,grinding media,and slurry inside the cylinder of a vertical stirring mill.Firstly,based on the working principle,the Discrete Element Method(DEM)was used to simulate the particle phase and Computational Fluid Dynamics(CFD)to simulate the fluid phase,respectively.A theoretical model of fluid-solid coupling inside the cylinder was constructed.Secondly,a simplified model of the experimental prototype was established,and the construction methods and parameters of the grinding sphere(DEM),slurry(CFD),and DEM-CFD coupling model were investigated,respectively.Then,the accuracy of different simulation models was verified by experiments.The results showed that the DEM-CFD simulation results were closer to the experimental values than DEM,there was a deviation of 5.43%between the torque obtained from DEM-CFD model and the experimental torque,while the DEM model had a deviation of 8.14%.By comparing the velocity,collision frequency,and agitator torque of the grinding spheres inside the cylinder,it was found that the slurry as a fluid domain had a significant impact on the movement of the grinding spheres.Its buoyancy and viscosity characteristics reduced the velocity and collision frequency,whereas it increased the torque of the spiral agitator.关键词
立式搅拌磨/DEM-CFD/离散元分析/流固耦合/介质球速度/碰撞次数Key words
vertical stirred mill/DEM-CFD/discrete element analysis/fluid-solid coupling/velocity of grinding sphere/collision frequency分类
矿山工程引用本文复制引用
瞿铁,马立峰,宋现洲,王朝华,张升奇,赵炎龙,纪昊男..基于DEM-CFD的立式搅拌磨机耦合仿真方法及实验研究[J].矿产保护与利用,2025,45(1):15-22,8.基金项目
山西省科技创新人才团队专项计划(202204051002002) （202204051002002）
