Numerical simulation for the initial state of avalanche in polydisperse particle systems

作     者：韩韧 李亭 迟志鹏 杨晖 李然 Ren Han;Ting Li;Zhipeng Chi;Hui Yang;Ran Li

作者机构：School of Optical-Electrical and Computer EngineeringUniversity of Shanghai for Science and TechnologyShanghai 200093China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2024年第33卷第2期

页      面：405-412页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Project supported by the Qingdao National Laboratory for Marine Science and Technology(Grant No.2015ASKJ01) the National Natural Science Foundation of China(Grant Nos.11972212,12072200,and 12002213). 

主　　题：avalanche initial state polydisperse particle systems propagation 

摘      要：Numerical simulation is employed to investigate the initial state of avalanche in polydisperse particle systems.Nucleation and propagation processes are illustrated for pentadisperse and triadisperse particle systems,respectively.In these processes,particles involved in the avalanche grow slowly in the early stage and explosively in the later stage,which is clearly different from the continuous and steady growth trend in the monodisperse system.By examining the avalanche propagation,the number growth of particles involved in the avalanche and the slope of the number growth,the initial state can be divided into three stages:T1(nucleation stage),T2(propagation stage),T3(overall avalanche stage).We focus on the characteristics of the avalanche in the T2 stage,and find that propagation distances increase almost linearly in both axial and radial directions in polydisperse systems.We also consider the distribution characteristics of the average coordination number and average velocity for the moving particles.The results support that the polydisperse particle systems are more stable in the T2 stage.