DEM study of the angle of repose and porosity distribution of cylindrical particles with different lengths
DEM study of the angle of repose and porosity distribution of cylindrical particles with different lengths
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不同长度圆柱颗粒的休止角和孔隙率分布的DEM研究
DOI：
10.1515/ijcre-2021-0174
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发表时间：
2021-09
影响因子：
1.6
通讯作者：
Yang You
中科院分区：
文献类型：
--
作者：
Heng Zhou;Xu Tian;Xingyu Guo;Mingyin Kou;Shengli Wu;Yansong Shen;Yang You
抽象的。用离散元方法数值研究了圆柱体颗粒长度对桩休止角和孔隙率的影响。讨论了休止角和孔隙率随滑动和滚动摩擦系数的变化规律。结果表明，与球形颗粒相比，圆筒桩的桩底尺寸较小，而圆筒桩的高度较大，堆积较陡。随着圆柱体长度的增加，桩的轮廓线变得陡峭，桩的休止角增大。休止角与滑动摩擦系数和滚动摩擦系数呈正相关。气孔率随圆柱体长度的增加而增大。孔隙度的变化趋势与休止角的变化趋势基本一致，且随着摩擦系数的增大，平均孔隙度增大。
Abstract. Effect of the length of cylindrical particle on repose angle and porosity of a pile was numerically studied using discrete element method. The variation of repose angle and porosity with coefficient of sliding and rolling friction were also discussed. The results shown that compared with sphere particle, the bottom size of cylindrical pile is smaller, while the height of cylinder pile is larger and the heap is steeper. With the increase of the length of cylinder, the contour line of the pile becomes steep, and the angle of repose increases. The repose angle shows a positive correlation with coefficient of sliding and rolling friction. The porosity increases with the increase of the length of cylinders. The trends of porosity are basically consist with that of repose angle, and with increase of friction coefficient, the average porosity increases.
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