Determination of geometrical parameters of the microstructure of a porous medium Application to cementitious materials
| Autor: | Olivier Millet, Fares Bennai, Mohamed Khaled Bourbatache, Abdelkarim Aït-Mokhtar, Chao-Fa Zhao |
|---|---|
| Přispěvatelé: | Laboratoire de Génie Civil et Génie Mécanique (LGCGM), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Laboratoire des Sciences de l'Ingénieur pour l'Environnement - UMR 7356 (LaSIE), Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3), Centre National de la Recherche Scientifique (CNRS)-Université de Lorraine (UL)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), University of Twente [Netherlands], NEEDS program, Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), University of Twente, Engineering Fluid Dynamics |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
020209 energy General Chemical Engineering Tortuosity 02 engineering and technology Constrictivity 01 natural sciences Homogenization (chemistry) [SPI]Engineering Sciences [physics] Mass transfer 0202 electrical engineering electronic engineering information engineering Composite material Porosity Homogenization Specific surface Condensed Matter Physics Microstructure Atomic and Molecular Physics and Optics n/a OA procedure 010406 physical chemistry 0104 chemical sciences Cementitious Porous medium |
| Zdroj: | International Communications in Heat and Mass Transfer International Communications in Heat and Mass Transfer, Elsevier, 2020, 117, pp.104786. ⟨10.1016/j.icheatmasstransfer.2020.104786⟩ International Communications in Heat and Mass Transfer, 2020, 117, pp.104786. ⟨10.1016/j.icheatmasstransfer.2020.104786⟩ International Communications in Heat and Mass Transfer, 117:104786. Elsevier |
| ISSN: | 0735-1933 |
| Popis: | International audience; 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 |
| Databáze: | OpenAIRE |
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