Determination of geometrical parameters of the microstructure of a porous medium Application to cementitious materials - Archive ouverte HAL Access content directly
Journal Articles International Communications in Heat and Mass Transfer Year : 2020

Determination of geometrical parameters of the microstructure of a porous medium Application to cementitious materials

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Abstract

Mass transfer in porous media is governed, besides the species diffusion coefficient, by the porosity and the geometrical parameters of the materials microstructure. This paper aims at developing a methodology for the determination of tortuosity and constrictivity factor based on a diffusion modeling in a porous medium of neutral species. Tortuosity was obtained by the computation of particles trajectory. After which, constrictivity was deduced from the formation factor, represented by the relative diffusion coefficient. Results show that tortuosity evolves in the opposite direction that the porosity while constrictivity evolves in the same direction. In addition, both parameters further slowdown the transfer for lower porosities. © 2020 Elsevier Ltd
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Dates and versions

hal-02932037 , version 1 (22-08-2022)

Licence

Attribution - NonCommercial - CC BY 4.0

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Khaled Bourbatache, Fares Bennai, C.-F. Zhao, O. Millet, Abdelkarim Aît-Mokhtar. Determination of geometrical parameters of the microstructure of a porous medium Application to cementitious materials. International Communications in Heat and Mass Transfer, 2020, 117, pp.104786. ⟨10.1016/j.icheatmasstransfer.2020.104786⟩. ⟨hal-02932037⟩
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