Effect of particle shape on the void space in granular materials: implications for the properties of granular filters

IF 2.4 3区工程技术 Granular Matter Pub Date : 2024-09-14 DOI:10.1007/s10035-024-01452-0

Ali Abdallah, Eric Vincens, Hélène Magoariec, Mohsen Ardabilian, Christophe Picault

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Abstract

This study investigates the influence of particle shape on the void space morphology and topology in granular materials. Numerical samples with spherical and ellipsoidal particle shapes were generated using the discrete element method. A segmentation algorithm was used to extract the pore space characteristics. The results reveal that particle shape significantly affects both constriction and pore sizes, with distinctive features according to flatness index or elongation ratio, the former being more significant than the latter. The obtained results were validated by conducting numerical filtration tests, which illustrated a direct correlation between the constriction properties derived from the pore space extraction and the blockage rate of fine particles in the filtration tests. The study revealed the importance of considering particle shape in filter design, emphasising its significant impact on pore space characteristics and filtration performance.

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颗粒形状对颗粒材料空隙的影响：对颗粒过滤器性能的影响

本研究探讨了颗粒形状对颗粒材料空隙形态和拓扑结构的影响。使用离散元方法生成了具有球形和椭圆形颗粒形状的数值样本。使用分割算法提取孔隙空间特征。结果表明，颗粒形状对收缩和孔隙大小都有显著影响，根据扁平指数或伸长率可得出不同的特征，前者比后者更为显著。通过进行数值过滤试验验证了所获得的结果，结果表明从孔隙提取得出的收缩特性与过滤试验中细颗粒的堵塞率之间存在直接关联。研究揭示了在过滤器设计中考虑颗粒形状的重要性，强调了颗粒形状对孔隙特征和过滤性能的重要影响。

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来源期刊

Granular Matter MATERIALS SCIENCE, MULTIDISCIPLINARY-MECHANICS

CiteScore

4.30

自引率

8.30%

发文量

期刊介绍： Although many phenomena observed in granular materials are still not yet fully understood, important contributions have been made to further our understanding using modern tools from statistical mechanics, micro-mechanics, and computational science. These modern tools apply to disordered systems, phase transitions, instabilities or intermittent behavior and the performance of discrete particle simulations. >> Until now, however, many of these results were only to be found scattered throughout the literature. Physicists are often unaware of the theories and results published by engineers or other fields - and vice versa. The journal Granular Matter thus serves as an interdisciplinary platform of communication among researchers of various disciplines who are involved in the basic research on granular media. It helps to establish a common language and gather articles under one single roof that up to now have been spread over many journals in a variety of fields. Notwithstanding, highly applied or technical work is beyond the scope of this journal.