Merging criteria for defining pores and constrictions in numerical packing of spheres
Merging criteria for defining pores and constrictions in numerical packing of spheres
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DOI：
10.1007/s10035-018-0808-z
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发表时间：
2018-06
期刊：
影响因子：
2.4
通讯作者：
F. Seblany;U. Homberg;E. Vincens;P. Winkler;Karl Josef Witt
中科院分区：
文献类型：
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作者：
F. Seblany;U. Homberg;E. Vincens;P. Winkler;Karl Josef Witt
粒状材料的空隙空间通常分为较大的局部体积，表示为孔和连接孔的喉道。喉咙中最小的部分通常被称为收缩部分。对孔隙和收缩的正确描述可能有助于理解与流体或细颗粒通过颗粒材料输送相关的过程，或建立不饱和颗粒介质的吸入模型。对于涉及球体堆积的数值颗粒材料，可以使用不同的方法来计算孔隙空间特性。然而，这些方法通常会引起孔隙网络的过度分割，并且通常应用合并步骤来减轻这种不期望的伪影，即使孔隙的精确描绘有些主观。本研究对球体填充中孔隙的不同合并标准进行了比较，并讨论了它们对材料的孔径分布和收缩尺寸分布的影响。最终提出这些合并技术之间的对应关系作为用户的指南。
The void space of granular materials is generally divided into larger local volumes denoted as pores and throats connecting pores. The smallest section in a throat is usually denoted as constriction. A correct description of pores and constrictions may help to understand the processes related to the transport of fluid or fine particles through granular materials, or to build models of imbibition for unsaturated granular media. In the case of numerical granular materials involving packings of spheres, different methods can be used to compute the pore space properties. However, these methods generally induce an over-segmentation of the pore network and a merging step is usually applied to mitigate such undesirable artifacts even if a precise delineation of a pore is somewhat subjective. This study provides a comparison between different merging criteria for pores in packing of spheres and a discussion about their implication on both the pore size distribution and the constriction size distribution of the material. A correspondence between these merging techniques is eventually proposed as a guide for the user.