Tran Ngoc, Tien Dung; Lewandowska, Jolanta et Bertin, Henri (2014). Experimental evidence of the double-porosity effects in geomaterials. Acta Geophysica , vol. 62 , nº 3. pp. 642-655. DOI: 10.2478/s11600-013-0198-x.
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Double-porosity is an important characteristic of microstructure in a large range of geomaterials. It designs porous media with connected fissures/fractures or aggregated soils. The origin of double-porosity can be natural or/and it can result from mechanical, chemical or biological damage. The presence of double-porosity can significantly affect the behaviour of geomaterials. In this paper we provide an experimental evidence of the double-porosity effects by performing laboratory experiments. Series of tracer dispersion experiments (in saturated and unsaturated steady-state water flow conditions) in a physical model of double-porosity geomaterial were carried out. For the comparative purposes, experiments of the same type were also performed in a singleporosity model medium. The results clearly showed that the double-porosity microstructure leads to the non-Fickian behaviour of the tracer (early breakthrough and long tail) in both saturated and unsaturated cases.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | double-porosity; physical model; unsaturated/saturated conditions; tracer dispersion; non-Fickian behaviour |
| Centre: | Centre Eau Terre Environnement |
| Date de dépôt: | 17 avr. 2018 20:23 |
| Dernière modification: | 10 mai 2021 15:10 |
| URI: | https://espace.inrs.ca/id/eprint/4675 |
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