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| 平面颗粒流的瓶颈效应及其与速度的关系 |
| 鲍德松1, 张训生1, 徐光磊1, 潘正权1, 唐孝威1, 陆坤权2 |
| (1)浙江大学物理系，杭州 310027; (2)中国科学院物理研究所，北京 100080 |
| The choke effect on a two-dimensional granular flow and the relation with its speed |
| Bao De-Song1, Zhang Xun-Sheng1, Xu Guang-Lei1, Pan Zheng-Quan1, Tang Xiao-Wei1, Lu Kun- Quan2 |
| (1)浙江大学物理系，杭州 310027; (2)中国科学院物理研究所，北京 100080 |
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摘要： 通过实验研究了二维传送带上圆片颗粒运动与开口大小及传送带速度的关系，发现当开口尺寸d固定时，存在临界速度vc，在v＜vc范围，流量Q随速度v线性增大，在vc处Q-v关系发生突变.改变颗粒运动速度v或改变开口尺寸d均有临界值，使颗粒流规律发生转变.这是由于开口尺寸或速度变化使颗粒间相互作用及颗粒流状态变化造成的.
关键词：
平面颗粒流
瓶颈效应
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Abstract： The motion of granular wafers relative to its speed and the opening-size at choke point has been studied experimentally on a two-dimensional conveyer belt. The result shows that there is a critical speed vc when the opening-size d is fixed. The rate of flow Q increases linearly with the speed v, when v＜vc.The change of the Q-v curve occurs at the speed of vc.The critical speed vc is dependent on the opening-size d. The interaction between the granular wafers is changed when altering the speed or the opening-size at the choke point, and affects the motion of granular flow.
Keywords：
two-dimensional granular flow
choke effect
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收稿日期: 2002-06-11
出版日期: 2005-04-03
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| 基金: 国家高技术研究发展计划惯性约束聚变技术基金(批准号：2002AA84TS06)和国家自然科学基金(批准号：10274071)资助的课题. |
| 引用本文: |
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鲍德松,张训生,徐光磊 等 . 平面颗粒流的瓶颈效应及其与速度的关系. 物理学报, 2003, 52(2): 404.
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| Cite this article: |
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Bao De-Song,Zhang Xun-Sheng,Xu Guang-Lei et al. The choke effect on a two-dimensional granular flow and the relation with its speed. Acta Phys. Sin., 2003, 52(2): 401-404.
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| URL: |
| http://wulixb.iphy.ac.cn/CN/Y2003/V52/I2/401 |
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2003, Vol. 52 
