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Double-Humped Transverse Density Profile in Two-Dimensional Chute Flow with Rough Sidewalls |
| HU Guo-Qi;ZHANG Xun-Sheng;BAO De-Song;TANG Xiao-Wei |
| Department of Physics, Zhejiang University, Hangzhou 310027 |
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| Cite this article: |
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HU Guo-Qi, ZHANG Xun-Sheng, BAO De-Song et al 2006 Chin. Phys. Lett. 23 652-655 |
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Abstract We study a two-dimensional granular rapid flow with rough sidewalls stuck with the same size discs by molecular dynamics simulation. A transient state of the double-humped density profile in the flowing process has been found, which appears and moves as travelling wave and is the same as the phenomena in the recent experiments [Acta Phys. Sin. 53 (2004) 3389 (in Chinese)]. Our simulation shows that the rough sidewalls play an important role in the converting momentum of boundary discs from the vertical direction to the horizontal one through particle collisions to form this profile and the good elasticity of discs ensures this effect. The appearance of the double-humped profile may be a precursor, which determines if the whole flow will be far repulsed from the boundary and become dilute eventually.
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| Keywords:
45.70.Mg
45.70.Qj
46.40.Cd
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Published: 01 March 2006
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| PACS: |
45.70.Mg
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(Granular flow: mixing, segregation and stratification)
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45.70.Qj
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(Pattern formation)
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46.40.Cd
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(Mechanical wave propagation (including diffraction, scattering, and dispersion))
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