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See detailA Modal Frequency-Domain Generalised Force Matrix for the Unsteady Vortex Lattice Method
Dimitriadis, Grigorios ULiege; Giannelis, N. F.; Vio, G. A.

in Journal of Fluids & Structures (2018), 76

The unsteady Vortex Lattice method is becoming an increasingly popular aerodynamic modelling method for incompressible aeroelastic problems, such as flexible low-speed aircraft, wind turbines and flapping ... [more ▼]

The unsteady Vortex Lattice method is becoming an increasingly popular aerodynamic modelling method for incompressible aeroelastic problems, such as flexible low-speed aircraft, wind turbines and flapping flight. It leads to discrete time aeroelastic state space equations, which must be solved in a time-marching framework. Eigenvalue or singular value decompositions of the discrete time equations can be used in order to perform stability analysis but such procedures must be accompanied by model order reduction because the size of the equations is large. This work proposes a modal frequency domain implementation of the Vortex Lattice method, resulting in a modal generalised force matrix. Model order reduction is implicit in the modal approach and stability analysis can be carried out using industry-standard flutter analysis techniques, such as the p-k method. The approach is validated by comparison to wind tunnel flutter data obtained from rectangular cantilever flat plate wings of different aspect ratios and sweep angles. It is found that the aeroelastic model predictions follow the experimental trends for both flutter speed and frequency but tend to be moderately conservative. [less ▲]

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See detailLes locataires de Babel : l’identité à l’épreuve du plurilinguisme et de l’interculturalité
Meunier, Deborah ULiege; Defays, Jean-Marc ULiege

in Actes du Congrès RFS. Identités, conflits et interventions sociolinguistiques (2018)

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See detailThe climate of Belgium and Luxembourg
Erpicum, Michel ULiege; Nouri, Meryem ULiege; Demoulin, Alain ULiege

in Demoulin, Alain (Ed.) Landscapes and landforms of Belgium and Luxembourg (2018)

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See detailErosion surfaces in the Ardenne-Oesling and their associated kaolinic weathering mantle
Demoulin, Alain ULiege; Barbier, F.; Deconinck, A. et al

in Landscapes and landforms of Belgium and Luxembourg (2018)

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See detailMateriality matters: What do we learn from small inscribed objects related to ruler cults?
Caneva, Stefano ULiege

in Caneva, Stefano (Ed.) The Materiality of Hellenistic Ruler Cults (2018)

The contribution focuses on small objects such as portable altars, small bases, vessel, stone plaques and blocks inscribed with dedications for rulers in an attempt to provide an in-depth analysis of a ... [more ▼]

The contribution focuses on small objects such as portable altars, small bases, vessel, stone plaques and blocks inscribed with dedications for rulers in an attempt to provide an in-depth analysis of a type of material that has often been neglected or underexploited, because of its serial nature and the poor textual information it bears. By combining material analysis of scripture and support with archaeological data (when available), the paper aims 1) to set the evidence back in a dynamic historical context and 2) to provide a methodological reflection on the way we can deal with an abundant but often underestimated evidence. The risk for generalization inherent in the treatment of many uncharacterized stones as “altars” emerges from a reassessment of the Cypriot documentation for Ptolemaic rulers. Moreover, Ptolemaic and Attalid case studies allows for a reflection on the role of small ritual objects in the dissemination of ruler cult across social strata and in the integration of cultic honours for rulers in the ritual landscape of the studied communities, in public as in private space, in sanctuaries as along the city streets. [less ▲]

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See detailPhysiology and molecular biology of trace element hyperaccumulation
Merlot, Sylvain; Garcia de la Torre, Vanesa S.; Hanikenne, Marc ULiege

in Echevarria, Guillaume; van der Ent, Antony; Morel, Jean Louis (Eds.) et al Agromining: farming for metals. Extracting unconventional resources using plants. (2018)

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See detailE-Graphic Novels
Crucifix, Benoît ULiege; Dozo, Björn-Olav ULiege

in Baetens, Jan; Frey, Hugo; Tabachnick, Stephen (Eds.) The Cambridge History of the Graphic Novel (2018)

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See detailLa presse vidéoludique
Dozo, Björn-Olav ULiege; Krywicki, Boris ULiege

in Blandin, Claire (Ed.) Manuel d'analyse de la presse magazine (2018)

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See detailKarstic Systems in Eastern Belgium: Remouchamps and Noû Bleû
Peeters, Alexandre ULiege; Ek, Camille ULiege

in Demoulin, Alain (Ed.) Landscapes and Landforms of Belgium and Luxembourg (2018)

Belgium is characterised by a wide variety of rocks, including carbonate formations, which are significantly represented in eastern Belgium. Among those formations, Devonian and Carboniferous carbonates ... [more ▼]

Belgium is characterised by a wide variety of rocks, including carbonate formations, which are significantly represented in eastern Belgium. Among those formations, Devonian and Carboniferous carbonates display the most developed karstic features, as illustrated by the two cave systems presented in this chapter. Although both systems are water caves, they differ in many ways. The Remouchamps Cave, developed in the Upper Devonian limestones, is a touristic cave, while the Noû Bleû Cave, developed in the Carboniferous carbonates, is a brand new discovery still under exploration. The two systems are of scientific interest and contain many deposits (speleothems and detrital sediments) providing records of past environmental changes and paleoclimates. Beside the Quaternary dynamics, the present-day dynamics can be highlighted within the karstic basins that encompass the two cave systems. The generation or reactivation of sinkholes and swallow holes is often favoured or triggered by human activity. Furthermore, the two basins offer several good examples of human interaction with karst environments, not only in terms of karstic constraints for humans but also as a resource that must be preserved. [less ▲]

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See detailKing and Pharaoh: Religious Encounters and the Ruler Cult in Ptolemaic Egypt
Caneva, Stefano ULiege

in Beyond the Nile: Egypt and the Classical World (2018)

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See detailA unique boulder-bed reach of the Amblève River, Ardenne, at Fonds de Quarreux: Modes of boulder transport
Houbrechts, Geoffrey ULiege; Petit, François ULiege; Van Campenhout, Jean ULiege et al

in Demoulin, Alain (Ed.) Landscapes and landforms of Belgium and Luxembourg (2018)

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See detailThe picturesque Ardennian valleys: Plio-Quaternary incision of the drainage system in the uplifting Ardenne
Rixhon, Gilles; Demoulin, Alain ULiege

in Demoulin, Alain (Ed.) Landscapes and landforms of Belgium and Luxembourg (2018)

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See detailThe periglacial ramparted depressions of the Hautes Fagnes Plateau: traces of Late Weichselian lithalsas
Demoulin, Alain ULiege; Houbrechts, Geoffrey ULiege; Juvigné, Etienne ULiege

in Demoulin, Alain (Ed.) Landscapes and landforms of Belgium and Luxembourg (2018)

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See detailSartre, une anthropologie politique
Cormann, Grégory ULiege

Book published by Peter Lang (2018)

Detailed reference viewed: 226 (25 ULiège)
See detailPsychiatrie et liberté : approche phénoménologique
Englebert, Jérôme ULiege; Cormann, Grégory ULiege

Conference (2018)

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See detailA fully coupled hydro-mechanical model for the modeling of coalbed methane recovery
Bertrand, François ULiege; Cerfontaine, Benjamin ULiege; Collin, Frédéric ULiege

in Natural Gas science and Engineering (2018)

Most coal seams hold important quantities of methane which is recognized as a valuable energy resource. Coal reservoir is considered not conventional because methane is held adsorbed on the coal surface ... [more ▼]

Most coal seams hold important quantities of methane which is recognized as a valuable energy resource. Coal reservoir is considered not conventional because methane is held adsorbed on the coal surface. Coal is naturally fractured, it is a dual-porosity system made of matrix blocks and cleats (i.e fractures). In general, cleats are initially water saturated with the hydrostatic pressure maintaining the gas adsorbed in the coal matrix. Production of coalbed methane (CBM) first requires the mobilization of water in the cleats to reduce the reservoir pressure. Changes of coal properties during methane production are a critical issue in coalbed methane recovery. Indeed, any change of the cleat network will likely translate into modifications of the reservoir permeability. This work consists in the formulation of a consistent hydro-mechanical model for the CBM production modeling. Due to the particular structure of coal, the model is based on a dual-continuum approach to enrich the macroscale with microscale considerations. Shape factors are employed to take into account the geometry of the matrix blocks in the mass exchange between matrix and fractures. The hydro-mechanical model is fully coupled. For example, it captures the sorption-induced volumetric strain or the dependence of permeability on fracture aperture, which evolves with the stress state. The model is implemented in the finite element code Lagamine and is used for the modeling of one production well. A synthetic reservoir and then a real production case are considered. To date, attention has focused on a series of parametric analyses that can highlight the influence of the production scenario or key parameters related to the reservoir. [less ▲]

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