摘要翻译：
本文报道了将单个尺寸的无粘性球形颗粒注入颗粒Hele-Shaw细胞形成的沙堆休止角的三维分子动力学模拟结果。特别是，我们感兴趣的是研究那些可能对Hele-Shaw细胞中颗粒混合物模式形成有显著影响的变量的影响。结果表明，摩擦力对桩的形成有明显的影响。此外，我们还看到，随着晶粒插入率的增加，休止角略有减小。我们还发现，与实验结果一致的是，细胞厚度是另一个重要的因素，休止角随细胞厚度的增加呈指数衰减。结果表明，这种效应可以解释为从二维到三维的交叉。实际上，用不同尺寸的晶粒表明，当晶粒尺寸和晶粒厚度都变化时，休止角的行为是由这两个变量之比的比例函数控制的。
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英文标题：
《The angle of repose of spherical grains in granular Hele-Shaw cells: A
  molecular dynamics study》
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作者：
Hamed Maleki, Fatemeh Ebrahimi, and Ehsan Nedaaee Oskoee
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最新提交年份：
2007
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分类信息：

一级分类：Physics        物理学
二级分类：Statistical Mechanics        统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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一级分类：Physics        物理学
二级分类：Materials Science        材料科学
分类描述：Techniques, synthesis, characterization, structure.  Structural phase transitions, mechanical properties, phonons. Defects, adsorbates, interfaces
技术，合成，表征，结构。结构相变，力学性质，声子。缺陷，吸附质，界面
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英文摘要：
  We report the results of three dimensional molecular dynamic simulations on the angle of repose of a sandpile formed by pouring mono-sized cohesionless spherical grains into a granular Hele-Shaw cell. In particular, we are interested to investigate the effects of those variables which may impact significantly on pattern formation of granular mixtures in Hele-Shaw cells. The results indicate that the frictional forces influence remarkably the formation of pile on the grain level. Furthermore, We see that increasing grain insertion rate decreases slightly the angle of repose. We also find that in accordance with experimental results, the cell thickness is another significant factor and the angle of repose decays exponentially by increasing the cell thickness. It is shown that this effect can be interpreted as a cross-over from two to three dimensions. In fact, using grains with different sizes shows that the behaviour of the angle of repose when both size and cell thickness are varied is controlled by a scaled function of the ratio of these two variables.
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PDF链接：
https://arxiv.org/pdf/711.2732