一维颗粒链中颗粒转动效应的研究  

Study on particle rotation effect in one-dimensional particle chain

作　　者：段文山[1] 彭晶 DUAN Wen-shan;PENG Jing(College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070,Gansu,China)

机构地区：[1]西北师范大学物理与电子工程学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2020年第3期43-47,共5页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(11965029)。

摘　　要：利用Hertz模型研究了颗粒系统中颗粒的运动规律,并采用DEM模拟方法对一维颗粒链中颗粒的转动随时间和空间的变化规律进行了数值模拟研究.研究结果表明,颗粒的转动角速度与颗粒系统中颗粒的运动粘滞系数和颗粒的预压缩量等参量有关,颗粒的转动按照指数规律衰减;文中定义了颗粒转动的空间特征长度,研究发现颗粒转动的空间特征长度依赖于颗粒的初始转动角速度、颗粒的运动粘滞系数、颗粒之间的摩擦系数和初始压缩量等.此外,文中还给出了颗粒转动的空间特征长度和这些参量的函数关系.In this paper,the equation of motion of a single particle in a particle system is established by using the Hertz model,and the DEM simulation method is used to numerically study the particle rotation effect in a one-dimensional particle chain.The results show that the particle rotation depends on the viscosity coefficient of particle and preompression etc.Particle rotation is a strongly nonlinear phenomenon.By defining the characteristic length of the particle rotation,we find that the characteristic length of the particle rotation depends on the parameters of the particle system,including the initial rotational angular velocity of the particles,the viscosity coefficient between the particles,the friction coefficient,and the initial compression.

关 键 词：Hertz势 DEM模拟 非线性 特征长度 

分 类 号：O241.7[理学—计算数学]