| Double-Humped Transverse Density Profile in Two-Dimensional Chute Flow with Rough Sidewalls |
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| 作者姓名： | 胡国琦 张训生 鲍德松 唐孝威 |
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| 作者单位： | Department of Physics, Zhejiang University, Hangzhou 310027 |
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| 基金项目： | Supported by the National Hi-Tech Inertial Confinement Fusion Committee under Grant No 202AA84ts06, and the National Natural Science Foundation of China under Grant No 10274071. |
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| 摘 要： | 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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| 关 键 词： | 瞬时态 二维激流 边界层 分子动力学模型 横向密度 |
| 收稿时间： | 2005-06-29 |
| 修稿时间： | 2005-06-29 |
Double-Humped Transverse Density Profile in Two-Dimensional Chute Flow with Rough Sidewalls |
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| HU Guo-Qi, ZHANG Xun-Sheng, BAO De-Song, TANG Xiao-Wei.Double-Humped Transverse Density Profile in Two-Dimensional Chute Flow with Rough Sidewalls[J].Chinese Physics Letters,2006,23(3):652-655. |
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| Authors: | HU Guo-Qi ZHANG Xun-Sheng BAO De-Song TANG Xiao-Wei |
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