A1 Journal article (refereed)
The Effect of Void Structure on the Permeability of Fibrous Networks (2017)

Koponen, A., Ekman, A., Mattila, K., Al-Qararah, A. M., & Timonen, J. (2017). The Effect of Void Structure on the Permeability of Fibrous Networks. Transport in Porous Media, 117(2), 247-259. https://doi.org/10.1007/s11242-017-0831-2

JYU authors or editors

Publication details

All authors or editors: Koponen, Antti; Ekman, Axel; Mattila, Keijo; Al-Qararah, Ahmad M.; Timonen, Jussi

Journal or series: Transport in Porous Media

ISSN: 0169-3913

eISSN: 1573-1634

Publication year: 2017

Volume: 117

Issue number: 2

Pages range: 247-259

Publisher: Springer

Publication country: Netherlands

Publication language: English

DOI: https://doi.org/10.1007/s11242-017-0831-2

Publication open access: Not open

Publication channel open access: 

Abstract

A Kozeny–Carman-based model of permeability for fibrous networks is proposed: the original model is extended by incorporating information about the local structure of the void space. Furthermore, it is demonstrated how in practice this added structural information can be retrieved from a three-dimensional digital image of a fibrous material. The proposed model is then validated for both foam- and water-deposited laboratory sheets of bleached kraft pulp (Scots pine) and chemi-thermo-mechanical pulp (CTMP, Norway spruce). The validation is carried out by comparing the model predictions against computationally determined permeability values. The related fluid-flow simulations are executed using the lattice-Boltzmann method together with high-resolution X-ray microtomography images. For both pulp materials, the sample sets had nearly equal porosities, but deviated substantially in their permeabilities. The proposed model was shown to improve prediction of permeability for the fibrous materials considered: the deviation between the predicted and computationally determined values was no more than 8%.

Keywords: permeability

Free keywords: fibrous porous media; Kozeny-Carman equation; pore structure; Lattice-Boltzmann; X-ray tomography

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Related projects

Ministry reporting: Yes

Reporting Year: 2017

JUFO rating: 1