Experimental evidence of the double-porosity effects in geomaterials

• Autorzy: Ngoc T.D , Lewandowska J. , Bertin H.

Identyfikatory

DOI

10.2478/s11600-013-0198-x

• Języki publikacji: EN

Abstrakty

EN

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 doubleporosity microstructure leads to the non-Fickian behaviour of the tracer (early breakthrough and long tail) in both saturated and unsaturated cases.

Słowa kluczowe

EN

double porosity; physical model; unsaturated conditions; saturated conditions; tracer dispersion; non-Fickian behaviour

PL

podwójna porowatość; model fizyczny; nienasycone warunki; nasycone warunki

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2014
• Tom: Vol. 62, no. 3
• Strony: 642--655
• Opis fizyczny: Bibliogr. 41 poz.

Twórcy

autor

Ngoc T.D

• Institut National de la Recherche Scientifique, Centre Eau Terre Environnement (INRS-ETE), Québec, Canada
• Faculty of Environment, Ho Chi Minh City University of Technology (HCMUT)/ Centre Asiatique de Recherche sur l’Eau (CARE), Ho Chi Minh City, Vietnam

autor

Lewandowska J.

• Laboratoire de Mécanique et Génie Civil (LMGC), Montpellier, France

autor

Bertin H.

• Laboratoire I2M-TREFLE Université de Bordeaux, Bordeaux, France

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