Effect of fabric anisotropy on filtration mechanisms in granular filters

IF 2.9 3区工程技术 Granular Matter Pub Date : 2025-02-17 DOI:10.1007/s10035-024-01485-5

Ali Abdallah, Eric Vincens, Hélène Magoariec, Christophe Picault

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Abstract

This study investigates the impact of fabric anisotropy on the directional filtration mechanisms in granular filters, which arise from inherent particle shape variations and different preparation methods. Using the discrete element method, diverse filter samples underwent extensive numerical filtration tests in different directions. Subsequently, the pore space of these samples was analysed using an extraction algorithm. The results highlight the significant influence of particle shapes and preparation methods on intensifying anisotropy, which in turn remarkably affects directional filtration properties. Analysis of the pore space reveals variations in pore connectivity across different directions, explaining the observed differences in retention coefficients. This study emphasises the need for a comprehensive approach that accounts for constriction size, number, and connectivity to yield precise results. It contributes valuable insights into the role of anisotropy in granular materials, sheds light on complex directional filtration mechanisms, and advances related applications.

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织物各向异性对颗粒过滤器过滤机理的影响

本研究探讨了织物各向异性对颗粒过滤器中定向过滤机制的影响，这种影响是由固有的颗粒形状变化和不同的制备方法引起的。采用离散元法，对不同的滤样进行了不同方向的大量数值过滤试验。随后，使用提取算法对这些样品的孔隙空间进行分析。结果表明，颗粒形状和制备方法对增强各向异性有显著影响，而各向异性又显著影响定向过滤性能。对孔隙空间的分析揭示了孔隙连通性在不同方向上的变化，解释了观察到的保留系数差异。这项研究强调需要一种综合的方法，考虑收缩的大小、数量和连通性，以产生精确的结果。它对颗粒材料中各向异性的作用提供了有价值的见解，揭示了复杂的定向过滤机制，并推进了相关的应用。

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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.