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Quantitative structural analysis of simulated granular packings of non-spherical particles

机译:非球形颗粒模拟颗粒堆积的定量结构分析

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A set of computationally generated granular packings of frictionless grains is statistically analyzed using tools from stochastic geometry. We consider both the graph of the solid phase (formed using the particle mid-points) and the pore-phase. Structural characteristics rooted in the analysis of random point processes are seen to yield valuable insights into the underlying structure of granular systems. The graph of the solid phase is analyzed using traditional measures such as edge length and coordination number, as well as more instructive measures of the overall transport properties such as geometric tortuosity, where significant differences are observed in the windedness of paths through the different particle graphs considered. In contrast, the distributions of pore-phase characteristics have a similar shape for all considered granular packings. Interestingly, it is found that prolate and oblate ellipsoid packings show a striking similarity between their solid-phase graphs as well as between their pore-phase graphs.
机译:使用随机几何学中的工具对一组计算生成的无摩擦颗粒的粒状填充物进行统计分析。我们考虑固相(使用颗粒中点形成)的图和孔相。根植于随机点过程分析的结构特征被认为可以对颗粒系统的基础结构产生有价值的见解。使用传统方法(例如边长和配位数)以及更具整体性的指导性方法(例如几何曲折)来分析固相图,其中通过不同的粒子图观察到的路径曲折性存在显着差异考虑过的。相反,对于所有考虑的粒状填料,孔相特征的分布具有相似的形状。有趣的是,发现扁长形和扁球形的椭圆形填料在它们的固相图之间以及在其孔相图之间都显示出惊人的相似性。

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