Intruder Motion in Two-Dimensional Shaken Granular Beds  

作　　者：马欢萍 吕勇军 郑宁 李粮生 史庆藩 

机构地区：[1]School of Physics, Beijing Institute of Technology, Beijing 100081 [2]Key Laboratory of Cluster Science (Ministry of Education), Beijing Institute of Technology, Beijing 100081 [3]Science and Technology on Electromagnetic Scattering Laboratory, Beijing 100854

出　　处：《Chinese Physics Letters》2014年第11期99-102,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 11104013.

摘　　要：The dynamical behavior of an intruder immersed in a two-dimensional shaken granular bed is experimentally investigated. With two types of background particles, f-Г phase diagrams depicting the intruder＇s motion are measured and compared. It is found that even with the same size and density ratio of the intruder to the background particles, the intruder exhibits a distinct behavior at given vibrational conditions： rising behavior in one granular bed; sinking behavior in another granular bed. We slightly tune the size and density ratio to confirm the reliability of the experimental results. In addition, we examine the influences of interstitial air, convection and the initial position on the intruder＇s motion, speculating that the opposite motion could be traced to the material properties of the background particles.The dynamical behavior of an intruder immersed in a two-dimensional shaken granular bed is experimentally investigated. With two types of background particles, f-Г phase diagrams depicting the intruder＇s motion are measured and compared. It is found that even with the same size and density ratio of the intruder to the background particles, the intruder exhibits a distinct behavior at given vibrational conditions： rising behavior in one granular bed; sinking behavior in another granular bed. We slightly tune the size and density ratio to confirm the reliability of the experimental results. In addition, we examine the influences of interstitial air, convection and the initial position on the intruder＇s motion, speculating that the opposite motion could be traced to the material properties of the background particles.

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术] TQ051.13[自动化与计算机技术—计算机科学与技术]