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See detailModelling of large-scale in situ ventilation test in clayey rock
Pardoen, Benoît ULg; Collin, Frédéric ULg; Talandier, Jean

Poster (2015, March 23)

see attached file

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See detailModelling of localised gas pathways in long-term gas injection test
Gerard, Pierre; Collin, Frédéric ULg; Harrington, Jon et al

Poster (2013)

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See detailModelling of localised gas preferential pathways in claystone
Gerard, Pierre; Harrington, Jon; Charlier, Robert ULg et al

in International Journal of Rock Mechanics & Mining Sciences (2014), 67

A long-term injection gas test on initially saturated claystone samples under isotropic confining pressure is modelled in a 2D hydro-mechanical framework, which includes the hydraulic anisotropy ... [more ▼]

A long-term injection gas test on initially saturated claystone samples under isotropic confining pressure is modelled in a 2D hydro-mechanical framework, which includes the hydraulic anisotropy. Evidences of localised pathways through the sample have been observed experimentally, which are difficult to reconcile with standard two-phaseflow models. The presence of an embedded pre-existing fracture is included in a continuum finite element model. A hydro-mechanical coupling between the fracture aperture, permeability and the retention properties along the fracture is included in the model. Due to the increase in permeability and the decrease of the air entry pressure induced by the rise in fluid pressure at constant mean total stress, the model provides good agreement with the experimental observations. The discussion offers additional insight into thefluidflow mechanisms into the sample and the processes involved in the development of localised gas pathways. This study allows conclusions to be drawn regarding the performance of the model and its practical limitations. [less ▲]

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See detailModelling of long-term deep renovation strategies for the Belgian building stock
Ruellan, Guirec ULg

Poster (2016, April 28)

To achieve the EU energy targets for 2050, the construction sector has to perform major transformations. In Belgium, the majority of building stock is particularly old and energy inefficient. The high ... [more ▼]

To achieve the EU energy targets for 2050, the construction sector has to perform major transformations. In Belgium, the majority of building stock is particularly old and energy inefficient. The high performance of new constructions represented in the nearly zero energy buildings target is not sufficient to ensure the efficiency of the overall building sector. Therefore, it is crucial to put in place a progressive renovation policy. Despite the different renovation strategies and projects that took place in the recent year in Belgium, the overall renovation rate remains almost stable for the last ten years. This study focuses on the renovation market in Belgium and analyzes the factors that influence the evolution of the renovation rate. The objective is the identification and development of effective strategies bypass that leads to increased renovation rates in Belgium. The research methodology is based on an iterative process, based on a systematic literature review of Flemish and Walloon projects, publications and policy. These first work package will allow to identify factors influencing the renovation rate and in other hand to build a model of the existing building stock. Impacts of the influencing factors on the building stock are simulated in the fourth work package in order to propose an action plan in the last part. Three mains outcomes are expected: A model of the existing building stock in Belgium and its retrofit potential, a simulation of the effects of different strategies used to increase the renovation rate in Belgium and a theoretical action plan on strategies to increase the rate of renovation in Belgium. These results are necessary to inform and support the decision making of policy makers, municipalities and operational planning authorities across Belgium. [less ▲]

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See detailModelling of Magma Chambers
Vander Auwera, Jacqueline ULg

in Lithos (2005), 83

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See detailModelling of mass-transfer induced instabilities at liquid-liquid interfaces based on molecular simulations
Schott, Robin; Pfennig, Andreas ULg

in Molecular Physics (2004), 102(4), 331-339

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See detailModelling of metal forming lubrication by O/W emulsions
MONTMITONNET, P.; STEPHANY, A.; CASSARINI, S. et al

in International Conference on Tribology in Manufacturing Processes. ICTMP 2007 (2007)

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See detailModelling of multibody systems in the local frame
Bruls, Olivier ULg; Sonneville, Valentin

in Proceedings of the 24th International Congress of Theoretical and Applied Mechanics (ICTAM) (2016, August)

A local frame finite element approach is proposed to describe the kinematics of a flexible multibody system, derive the equations of motion and solve them numerically. It is argued that this approach ... [more ▼]

A local frame finite element approach is proposed to describe the kinematics of a flexible multibody system, derive the equations of motion and solve them numerically. It is argued that this approach leads to reduced geometric nonlinearities and improved computational efficiency. [less ▲]

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See detailModelling of multiphase flow in packed beds by computer-assisted x-ray tomography
Toye, Dominique ULg; Marchot, Pierre ULg; Crine, Michel ULg et al

in Measurement Science & Technology (1996), 7(3), 436-443

The high resolution which can be obtained by computer-assisted x-ray tomography is used to investigate Various scale heterogeneities of the flow texture characterizing multiphase flow in packed beds. The ... [more ▼]

The high resolution which can be obtained by computer-assisted x-ray tomography is used to investigate Various scale heterogeneities of the flow texture characterizing multiphase flow in packed beds. The direct counting of 'irrigated' pixels allows the determination of the number of individual liquid rivulets as well as their size. The evolution of the liquid flow texture versus the liquid velocity agrees quite well with the predictions of a percolation-based model. This agreement is further confirmed by the comparison of the experimental hold-up values averaged over the column cross-section with the theoretical model. [less ▲]

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See detailModelling of peri-implant osteogenesis by means of a fracture healing mode
Amor, Nadia; Geris, Liesbet ULg; Vander Sloten, Jos et al

in Journal of Biomechanics (2008), 41(S1), 289

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See detailModelling of radionuclides transport by sediments in waterways
Smitz, Joseph ULg; Everbecq, Etienne ULg; Frere, Eddy

Conference (1985)

Radionuclides realeased by nuclear plants in surface waters are not simply transported by the water. Other complex phenomena occur : adsorbtion/desorbtion to sediments, sedimentation and accumulation on ... [more ▼]

Radionuclides realeased by nuclear plants in surface waters are not simply transported by the water. Other complex phenomena occur : adsorbtion/desorbtion to sediments, sedimentation and accumulation on river's bed, interaction with interstitial water, and eventually resuspension in the water column. The aim of this work is the description and modelling of the majors processes which govern the contamination of surface waters and sediments by radionuclides to food chain and to man. The model is applied to the river Meuse. The results shows a good aggreement with available field measurements realized during routine surveys. [less ▲]

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See detailModelling of repeated series of count data measured at unequally spaced times
Lambert, Philippe ULg

in Journal of the Royal Statistical Society : Series C (Applied Statistics) (1996), 45

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See detailModelling of semi-continuous casting of cupro-nickel alloys
Pascon, Frédéric ULg; Pecquet, Etienne ULg; Zhang, Lihong ULg et al

in Papadrakakis, M.; Onate, E.; Schrefler, B. (Eds.) Proceedings of the International Conference on Computational Methods for Coupled Problems in Science and Engineering (2005)

This research developed at University of Liege aims to optimize the complete semi-continuous casting process at LBP Company, a producer of copper-nickel alloys (or cupro-nickels). The process consists in ... [more ▼]

This research developed at University of Liege aims to optimize the complete semi-continuous casting process at LBP Company, a producer of copper-nickel alloys (or cupro-nickels). The process consists in vertical casting of 7m long ingots. Some problems recurrently occur during casting process: formation of oscillations (wave length of about 500 mm), unsuitable concave cross-sections or internal cracks. In order to reduce the occurrence of such defects and to better understand their formation, we have been asked to develop a finite element model. The research focuses on two main topics: identification of material properties through laboratory tests and literature survey and the development of the numerical tool. The laboratory tests provide thermal and mechanical properties of the ingot and the mould, as well as heat transfer coefficients between the ingot and its surroundings (mould, air and water). These parameters are required for the numerical simulations of the process. In the second part of the research, numerical calculations have been performed using finite element method. Two types of 2D models have already been studied: horizontal slice and vertical slice. This first choice has been guided by the high coupling between thermal and mechanical aspects of the problem, leading to highly complex systems of equations and subsequent long CPU times. However, due to the limitations of such 2D models, a 3D formulation has then been considered and it is still in progress. [less ▲]

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See detailModelling of semi-rigid connections: column bases
Jaspart, Jean-Pierre ULg; Vandegans, D.

in Proceedings of the IABSE Colloquium on Semi-Rigid Structural Connections (1996)

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See detailModelling of sewer systems as a component of a global hydrological model
Khuat Duy, Bruno ULg; Archambeau, Pierre ULg; Dewals, Benjamin ULg et al

in Proceedings of the 4th International Conference on Advanced Computational Methods in Engineering (2008)

Hydrology often takes an important place in the domain of hydraulic structures management, and is a key component of many hydraulic studies. Modelling the main hydrological processes requires a particular ... [more ▼]

Hydrology often takes an important place in the domain of hydraulic structures management, and is a key component of many hydraulic studies. Modelling the main hydrological processes requires a particular attention in order to deal with problems in an optimal way. Instrumented basins studies has pointed out the considerable impact of the sewer system on the hydrological outputs dynamics on small basins, even poorly urbanized. The current models often take into account the distributed impervious areas by adapting the corresponding surfaces runoff or infiltration coefficients. This approach, which is suited to produce correct runoff volumes, is however unable to represent the real flow outputs dynamics in which important variations can occur with a hourly time step. Modelling this flow component is essential to catch the rapidly-varying flow inputs generated by the runoff on drained impervious areas. An efficient modelling method has therefore been developed to include the sewer system in a global hydrological model (WOLF), using accurate landuse data in vector format and available data on the sewage system. These developments have been successfully tested on the Berwinne basin, Belgium. [less ▲]

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See detailModelling of shear band localisation using interface finite elements
Charlier, Robert ULg

in Int. Conf. on Numerical Methods in Geomechanics, NUMOG IV (1992, August)

Detailed reference viewed: 13 (2 ULg)
See detailModelling of Single Droplets
Groß-Hardt, E; Pfennig, Andreas ULg

Conference (2004)

Detailed reference viewed: 3 (0 ULg)