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See detailHydro-mechanical modelling of the Excavation Damaged Zone around an underground excavation at Mont Terri Rock Laboratory
Levasseur, Séverine ULg; Charlier, Robert ULg; Frieg, Bernd et al

in International Journal of Rock Mechanics & Mining Sciences (2010), 47(3), 414-425

A zone with significant irreversible deformations and significant changes in flow and transport properties is expected to be formed in indurated clay around underground excavations. The stress ... [more ▼]

A zone with significant irreversible deformations and significant changes in flow and transport properties is expected to be formed in indurated clay around underground excavations. The stress perturbation around the excavation could lead to a significant increase of the permeability, related to diffuse and/or localized crack propagation in the material. The main objective of the study is to model these processes at large scale in order to assess their impacts on the performance of radioactive waste geological repositories. This paper concerns more particularly the hydro-mechanical modelling of a long term dilatometer experiment performed in Mont Terri Rock Laboratory in Switzerland within the Selfrac Project. The proposed model defines the permeability as a function of the aperture of the cracks that are generated during the excavation. With this model, the permeability tensor becomes anisotropic. Advantages and drawbacks of this approach are described thanks to the results of the Selfrac long term dilatometer experiment. [less ▲]

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See detailHydro-mechanical numerical modelling of geotechnical problems using local second gradient models
Chambon, René; Collin, Frédéric ULg

in Vermeer, Peter; Ehlers, W.; Herrmann, H. J. (Eds.) Modelling of cohesive-Frictional Materials (2004)

The paper presents some applications of a local second gradient theory used to describe the mechanical behavior of a continua. This theory has been developed in order to avoid some well known drawbacks of ... [more ▼]

The paper presents some applications of a local second gradient theory used to describe the mechanical behavior of a continua. This theory has been developed in order to avoid some well known drawbacks of classical theories, when softening and/or localization occur in a computation. This theory is extended and then applied in a hydromechanical coupled problem, in the case of fully saturated geomaterials. The corresponding finite element method taking into account the geometrical non linearities is detailed. Preliminary results using the finite element code developed in this context are then discussed and allow to study post localization behavior. [less ▲]

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See detailHydrocarbons contamination of smoked shrimp, an expanding food condiment in Beninese local markets
Kpoclou, Euloge; Brose, François ULg; Anihouvi, V.B. et al

Poster (2013, April 18)

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See detailHydroCube: a new entity-relationship hydrogeological data model
Wojda, Piotr; Brouyère, Serge ULg; Derouane, Johan et al

in Hydrogeology Journal (2010), 18(8), 1953-1962

Managing, handling, and accessing hydrogeological information depend mainly on the applied hydrogeological data models, which differ between institutions and across countries. Growing interest in ... [more ▼]

Managing, handling, and accessing hydrogeological information depend mainly on the applied hydrogeological data models, which differ between institutions and across countries. Growing interest in hydrogeological information diffusion, combined with a need for information availability, require the convergence of hydrogeological data models to make hydrogeological information accessible to multiple users such as universities, administrations, water suppliers, and research organisations. Furthermore, because hydrogeological studies are complex, they require a large variety of high-quality hydrogeological data with appropriate metadata in clearly designed and coherent structures. A need therefore exist to develop and implement hydrogeological data models that cover, as much as possible, the full hydrogeological domain. To respond to these requirements, a new data model, called HydroCube, has been developed for the Walloon Region in Belgium. The HydroCube model presents an innovative holistic “project-based” approach, which covers a full set of hydrogeological concepts and features, allowing for effective hydrogeological project management. This approach enables to store data about the project localisation, hydrogeological equipment, related observations and measurements. In particular, the model focuses on specialized hydrogeological field experiments, such as pumping and tracer tests. This logical data model uses entity-relationship diagrams and it has been implemented in the MS Access environment as the HydroCube database. It has been additionally enriched with a fully functional user-interface. [less ▲]

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See detailHydrodéchloration catalytique de composés organochlorés
Heinrichs, Benoît ULg

Learning material (2004)

Detailed reference viewed: 16 (2 ULg)
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See detailHydrodéchloration sélective du 1,2-dichloroéthane en éthylène sur un catalyseur xérogel Pd-Ag/SiO2
Heinrichs, Benoît ULg; Delhez, P.; Pirard, Jean-Paul ULg et al

in Récents Progrès en Génie des procédés (1997, September 24)

Detailed reference viewed: 19 (7 ULg)
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See detailHydrodechlorination of 1,2-dichloroethane into ethylene : selectivity of Pd-Ag alloys of known surface composition
Heinrichs, Benoît ULg; Lambert, Stéphanie ULg; Schoebrechts, Jean-Paul et al

in Heterogeneous Catalysis, Proceedings of the 9th International Symposium (2000, September 23)

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See detailHydrodechlorination of 1,2-dichloroethane on Pd-Ag catalysts supported on tailored texture carbon xerogels
Job, Nathalie ULg; Heinrichs, Benoît ULg; Ferauche, Fabrice et al

in Catalysis Today (2005), 102

Porous carbon xerogels synthesized in a previous study were investigated as catalysts supports. The support chosen was a micro-mesoporous carbon xerogel obtained from the pyrolysis of a resorcinol ... [more ▼]

Porous carbon xerogels synthesized in a previous study were investigated as catalysts supports. The support chosen was a micro-mesoporous carbon xerogel obtained from the pyrolysis of a resorcinol-formaldehyde resin whose synthesis variables were fixed at suitable values. Palladium and silver were deposited on this tailored texture carbon by co-impregnation using a solution of palladium and silver nitrates in nitric acid and water. Several catalysts were prepared with various Pd and Ag global contents, the latters being measured experimentally. Alloy particles, detected in all bimetallic samples, were studied by a combination of various techniques that enabled us to obtain their size as well as their bulk and surface composition. When present, the fraction of unalloyed silver was also calculated. The characterization data were related to the results of catalytic tests obtained for selective hydrodechlorination of 1,2-dichloroethane into ethylene. Results show that when the Ag content is too high, pure Ag particles are formed and the alloy composition remains constant. As a consequence, the surface composition of the alloy is constant as well and the catalytic tests lead to similar results. (c) 2005 Elsevier B.V. All rights reserved. [less ▲]

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See detailHydrodechlorination of 1,2-dichloroethane on Pd-Ag catalysts supported on texture-tailored materials
Job, Nathalie ULg; Heinrichs, Benoît ULg; Ferauche, Fabrice et al

Conference (2004, July 19)

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See detailHydrodynamic and hydrodispersive behaviour of chalk under variably saturated conditions
Brouyère, Serge ULg

Conference (2003, March 11)

The presentation describes a conceptual and mathematical model for solute migration in variably saturated fractured dual porosity, dual permeability chalk

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See detailHydrodynamic and hydrodispersive behaviour of variably saturated chalk : a field investigation
Brouyère, Serge ULg

Conference (2003, March 19)

The presentation described field investigations on contaminant transport across unsaturated chalk rocks, including tracer tests

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See detailHydrodynamic Approaches to Design Balancing Ponds
Pirotton, Michel ULg

in Marshall, English; Andras, Szollosi-Nagy (Eds.) Managing Water: Coping with Scarcity and Abundance (1997)

Detailed reference viewed: 10 (1 ULg)
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See detailHydrodynamic forces acting on vertically translating bodies in free surface water
Kerger, François ULg; Detrembleur, Sylvain ULg; Archambeau, Pierre ULg et al

in WIT Transactions on The Built Environment, Vol 105, Fluid Structure Interaction V (2009, May)

Detailed reference viewed: 47 (12 ULg)
See detailHydrodynamic modelling, damage evaluation and technical adaptation measures
Dewals, Benjamin ULg

Conference (2008, January 10)

Detailed reference viewed: 5 (2 ULg)