| 准二维二元混合颗粒动态循环反转分层的体积效应 |
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| 引用本文： | 吴宇航,郑宁,文平平,李粮生,史庆藩,孙刚.准二维二元混合颗粒动态循环反转分层的体积效应[J].物理学报,2011,60(2):24501-024501. |
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| 作者姓名： | 吴宇航 郑宁 文平平 李粮生 史庆藩 孙刚 |
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| 作者单位： | (1)北京理工大学物理系,原子分子簇科学教育部重点实验室,北京 100081; (2)中国科学院物理研究所,北京凝聚态物理国家实验室,北京 100190 |
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| 基金项目： | 国家自然科学基金(批准号:10975014,10875166)资助的课题. |
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| 摘 要： | 对垂直振动作用下准二维二元混合颗粒系统的动态循环反转分层现象进行了系统研究,得到了频率与加速度的关系相图,并观测到分层的动态循环反转区域. 发现动态循环的反转周期与颗粒总体积的变化有单调递增关系. 利用Hong的竞争机制理论对动态循环反转的现象及其体积效应的机理给出了解释.
关键词：
颗粒
分层
周期
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| 关 键 词： | 颗粒 分层 周期 |
| 收稿时间： | 2010-04-18 |
Volume effect in the cyclic segregation of quasi two-dimensional binary granular mixture |
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| Wu Yu-Hang,Zheng Ning,Wen Ping-Ping,Li Liang-Sheng,Shi Qing-Fan,Sun Gang.Volume effect in the cyclic segregation of quasi two-dimensional binary granular mixture[J].Acta Physica Sinica,2011,60(2):24501-024501. |
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| Authors: | Wu Yu-Hang Zheng Ning Wen Ping-Ping Li Liang-Sheng Shi Qing-Fan Sun Gang |
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| Institution: | Department of Physics, Beijing Institute of Technology, Beijing 100081, China;Department of Physics, Beijing Institute of Technology, Beijing 100081, China;Department of Physics, Beijing Institute of Technology, Beijing 100081, China;Department of Physics, Beijing Institute of Technology, Beijing 100081, China;Department of Physics, Beijing Institute of Technology, Beijing 100081, China;Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | A systematic study about the cyclic segregation observed experimentally in a vertically vibrated quasi two-dimensional binary granular mixture is reported. The frequency-amplitude phase diagram was obtained, in which the region of cyclic segregation was found. We also measured the period of the cyclic segregation and showed the relationship between the period and total volume of granular mixture. Finally, the competition mechanism of percolation and condensation from Hong’s theory is used to explain the cyclic segregation and volume effect qualitatively. |
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| Keywords: | granular matter segregation period |
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