微细颗粒碰撞作用规律的数值模拟  

Numerical Simulation on Collision Characteristics of Micro-sized Particles

作　　者：孙少伟 邓小良[2] 赵美成 李鹏[3] 徐锐 余国锋 陈本良 任波 江丙友[5] 卢薇 齐福刚 祝文军[2] 曹良志[1] 欧阳晓平[1,7] 袁亮 SUN Shaowei;DENG Xiaoliang;ZHAO Meicheng;LI Peng;XU Rui;YU Guofeng;CHEN Benliang;REN Bo;JIANG Bingyou;LU Wei;QI Fugang;ZHU Wenjun;CAO Liangzhi;OUYANG Xiaoping;YUAN Liang(School of Energy and Power Engineering,Xi’an Jiao Tong University,Xi’an,Shanxi 710049,China;Key Laboratory of Shock Wave and Detonation Physics,Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang,Sichuan 621900,China;Shenhua Shendong Coal Group Technology Research Institute,Shenmu,Shanxi 719315,China;Coal Mining National Engineering Technology Research Institute,Huainan,Anhui 232001,China;School of Mining and Safety Engineering,Anhui University of Science and Technology,Huainan,Anhui 232001,China;Guangdong HERE Environmental Technology Co.Ltd.,Foshan,Guangdong 528000,China;School of Materials Science and Engineering,Xiangtan University,Xiangtan,Hunan 411100,China)

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049 [2]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理重点实验室,四川绵阳621900 [3]神华神东煤炭集团技术研究院,陕西神木719315 [4]煤炭开采国家工程技术研究院,安徽淮南232001 [5]安徽理工大学能源与安全学院,安徽淮南232001 [6]广东贺尔环境科技有限公司,广东佛山528000 [7]湘潭大学材料科学与工程学院,湖南湘潭411100

出　　处：《计算物理》2019年第6期631-640,共10页Chinese Journal of Computational Physics

基　　金：中国神华能源股份有限公司科技创新项目及重点基础研究发展计划(SHGF-16-14);国家重点研发计划(2017YFC0805202);平安煤炭开采工程技术研究院有限责任公司自主创新项目资助

摘　　要：通过实验和数值模拟方法,对微细颗粒(直径小于100μm)碰撞规律进行研究.首先采用离散元模拟,基于改进的硬球模型,探索在流场作用下,微细颗粒的初始速度、表面能、尺寸、质量浓度和风速对微细颗粒之间的结合性碰撞及非结合性碰撞的影响,同时考虑微细颗粒团聚及沉降的物理运移过程,得出不同初始条件下微细颗粒碰撞频率的演化规律.最后进行物理实验,发现模拟得到的碰撞频率与实验得到的微细颗粒自沉降特征相一致.We investigate collision characteristics of micro-sized particles(diameter less than 100 microns)via numerical simulations and experiments.Discrete element method(DEM)simulations,based on improved hard-sphere model,are performed to explore effect of initial velocity,surface energy,size,mass concentration,and wind speed on cohesive collisions and non-cohesive collisions between micro-sized particles.Aggregation and settlement process are considered as well.It is found that simulated cohesive collision rate agrees with experimental results of self-settlement of micro-sized particles.

关 键 词：微细颗粒 离散元 硬球模型 碰撞频率 

分 类 号：TB122[理学—工程力学]