Tortuosity of Internal Pore Space in Variously Structured Platelet Particles

Ishiyama, Kyoka; Yamamoto, Keita; Harada, Shusaku; Yagi, Tsubasa

Tortuosity of Internal Pore Space in Variously Structured Platelet Particles

Ishiyama, Kyoka; Yamamoto, Keita; Harada, Shusaku et al.

Transport in porous media, 2023, 148(3), 535-557

Permalink : https://hdl.handle.net/2115/92429

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論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/92429
タイトル	Tortuosity of Internal Pore Space in Variously Structured Platelet Particles
著者	Ishiyama, Kyoka ; Yamamoto, Keita ; Harada, Shusaku ; Yagi, Tsubasa
著者名 Ishiyama, Kyoka
著者名 Yamamoto, Keita
e-Rad_Researcher 80315168 著者名 Harada, Shusaku
著者名 Yagi, Tsubasa
言語	英語
キーワード	Tortuosity
	Platelet particles
	Macroscopic structures
	Diffusivity
発行日	2023-07
出版者	Springer
収録物名	Transport in porous media
巻(号)	148(3)
ページ	535-557
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	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: http://dx.doi.org/10.1007/s11242-023-01958-w
PISSN	0169-3913
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1007/s11242-023-01958-w