| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Anomalous Increase of Apparent Mass in a Silo due to Percolation |
| Ram Chand1, Abdul Qadir1, SHI Qing-Fan1**, ZHENG Ning1, SUN Gang2**
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1Key Laboratory of Cluster Science of Ministry of Education, and School of Physics, Beijing Institute of Technology, Beijing 100081
2Beijing National Laboratory for Condensed Matter Physics and Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190
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| Cite this article: |
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Ram Chand, Abdul Qadir, SHI Qing-Fan et al 2011 Chin. Phys. Lett. 28 098301 |
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Abstract The apparent mass at the bottom of a granular pile confined in a vertical tube decreases for denser granular packing. We report that the denser granular packing comprising two different diameters of granules augments the apparent mass instead. This anomalous behavior occurs when small granules are stacked on the large ones. In the case of anomalous increase, a percolation effect is found and correlated with the augment of apparent mass at the bottom of the granular column. Finally, the results are qualitatively explained by using the Janssen model.
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| Keywords:
83.80.Fg
45.70.Cc
45.70.-n
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Received: 10 January 2011
Published: 30 August 2011
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