各向同性湍流中颗粒碰撞特性的数值研究  

Numerical study of particle collision characteristics in isotropic turbulence

作　　者：于建国 YU Jian-guo(China Aluminum Shandong Engineering Technology Co.,Ltd,Zibo 255000,China)

机构地区：[1]中铝山东工程技术有限公司,山东淄博255000

出　　处：《世界有色金属》2023年第17期211-213,共3页World Nonferrous Metals

摘　　要：了解分散的颗粒如何与湍流相互作用可以更好地预测危险性过程和设计工业设施。本文利用直接数值模拟方法,将结合DEM软球碰撞模型的点颗粒法的结果与单向耦合点颗粒法进行了对比,研究了在不同湍流强度下固体颗粒分布特征及碰撞特性,同时本章还进一步研究了不同颗粒的尺寸对颗粒分布特征及碰撞特征的影响规律。结果表明:采用考虑颗粒相互作用的点颗粒法模拟时,在不同颗粒尺寸条件下,斯托克斯数为1.5时会出现富集现象。Understanding how dispersed particles interact with turbulence can better predict hazardous processes and design industrial facilities.Based on the direct numerical simulation method,the Point-Particle Model combined with the DEM Soft-Sphere Collision Model was used to study the distribution characteristics of solid particles and the impact of collision characteristics under different turbulence intensities and compares them with the one-way coupled Point-Particle Model.In this chapter,the effects of different particle sizes and densities on the distribution characteristics and collision characteristics of solid particles are further studied The results indicate that when using the Point-Particle Model considering particle interactions for simulation,enrichment occurs at Stokes number 1.5 under different particle sizes.

关 键 词：LBM 点颗粒 软球模型 颗粒分布 碰撞特征 

分 类 号：TB126[理学—工程力学]