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Tortuosity of Internal Pore Space in Variously Structured Platelet Particles

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Title: Tortuosity of Internal Pore Space in Variously Structured Platelet Particles
Authors: Ishiyama, Kyoka Browse this author
Yamamoto, Keita Browse this author
Harada, Shusaku Browse this author →KAKEN DB
Yagi, Tsubasa Browse this author
Keywords: Tortuosity
Platelet particles
Macroscopic structures
Issue Date: Jul-2023
Publisher: Springer
Journal Title: Transport in porous media
Volume: 148
Issue: 3
Start Page: 535
End Page: 557
Publisher DOI: 10.1007/s11242-023-01958-w
Abstract: Numerical investigations of pore characteristics in platelet particles with various macroscopic structures were performed for fundamental understanding of transport properties in clay layers composed of montmorillonite particles. The effect of macroscopic structures of particles on the geometric characteristics of pore networks was examined, particularly focusing on the tortuosity which represents the sinuosity of voids. Monte Carlo simulations of platelet particles under various initial configurations were performed to obtain metastable structures with internal differences. A random walk analysis was performed in extracted macropores of platelet structures. The tortuosity of pore network in variously structured platelet particles was evaluated from the results of the random walk analysis. The numerical results showed that the macrostructures of particles form complicated pore networks, which significantly influence the tortuosity. The "diffusional" tortuosity obtained from the random walk analyses was compared with the existing "geometrical" tortuosity model. It was found that configurational characteristics of platelets, such as size and orientation angle of particle clusters, were vital to estimate the tortuosity. The obtained tortuosity was also compared with the experimental results of the diffusion coefficient in clay layers obtained from previous studies. The results suggested that a complicated density dependence of diffusivity in clay arises from the diversity of macroscopic particle structures.
Rights: This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at:
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 原田 周作

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