Discharge oscillation of parti-cles from a vertical pipe with capillary outlet  

作　　者：HUMaobin WUQingsong KONGXiangzhao WUYonghong 

机构地区：[1]SchoolofEngineeringScience,UniversityofScienceandTechnologyofChina,Hefei230026,China [2]DepartmentofMathematiesandStatistics,CurtinUniversityofTechnology,PerthWA6845,Australia

出　　处：《Chinese Science Bulletin》2005年第11期1076-1078,共3页

基　　金：the National Natural Science Foundation of China(Grant No.10274074); the Australian Research Council through a Discovery Project Grant

摘　　要：A new style of discharge process from a vertical open-top pipe with capillary outlet is reported. The outflux fluctuates greatly with time and the bulk condensed granular flow in the pipe shows stop-and-go motion when the filling height is above a threshold. When the filling height falls to- wards the threshold, led by a transitional stage, the outflux and the bulk movement become much stable. The upper surface dropping velocity variation is measured. A heuristic theory is proposed to understand the stop-and-go motion and the transitional behavior.A new style of discharge process from a vertical open-top pipe with capillaryoutlet is reported. The outflux fluctuates greatly with time and the bulk condensed granular flowin the pipe shows stop-and-go motion when the filling height is above a threshold. When the fillingheight falls towards the threshold, led by a transitional stage, the outflux and the bulk movementbecome much stable. The upper surface dropping velocity variation is measured. A heuristic theory isproposed to understand the stop-and-go motion and the transitional behavior.

关 键 词：放电现象 粒子摆动 空间空隙 细管状出口 粒子矩阵 

分 类 号：O572.2[理学—粒子物理与原子核物理]