TRAN NGOC, Tien Dung; LEWANDOWSKA, Jolanta; BERTIN, Henri

doi:10.2478/s11600-013-0198-x

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TRAN NGOC, Tien Dung
Institut National de la Recherche Scientifique [Québec] [INRS]
Faculty of Chemical Engineering [Vietnam National University, HCM]

LEWANDOWSKA, Jolanta
Physique et Mécanique des Milieux Divisés [PMMD]

BERTIN, Henri

Transferts, écoulements, fluides, énergétique [TREFLE]

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Ce document a été publié dans

Acta Geophysica. 2014-06, vol. 62, n° 3, p. 642-655

De Gruyter Open

Résumé en anglais

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 single-porosity 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.< Réduire

Mots clés en anglais

double-porosity

physical model

unsaturated/saturated con- ditions

tracer dispersion

non-Fickian behaviour

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Experimental evidence of the double-porosity effects in geomaterials

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Résumé en anglais

Mots clés en anglais

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