Showing results 121 to 140 of 271
  Experimental investigation of flow and deposit patterns in rectangular shallow reservoirs: preliminary analysisDufresne, Matthieu  ; Dewals, Benjamin ; Erpicum, Sébastien et alin Proceedings International Workshop on Environmental Hydraulics: Theoretical, Experimental and Computational Solutions (2009) Detailed reference viewed: 12 (3 ULg)From Hydrology to Detailed Risk Analysis, a Consistent Micro-Scale ApproachPaulus, Raphaël ; Detrembleur, Sylvain ; et alSpeech (2009) Detailed reference viewed: 21 (12 ULg)Modélisation hydrologique à grande échelle des zones imperméables égouttées; Archambeau, Pierre ; Erpicum, Sébastien et alin Houille Blanche (2009), (5), 167-173 En hydrologie, la manière de prendre en compte les zones urbaines diffère sensiblement selon les dimensions des bassins et la résolution temporelle des événements pluvieux étudiés. A petite échelle, les ... [more ▼] En hydrologie, la manière de prendre en compte les zones urbaines diffère sensiblement selon les dimensions des bassins et la résolution temporelle des événements pluvieux étudiés. A petite échelle, les zones urbaines peuvent être modélisées grâce à une description détaillée des divers écoulements existants. En particulier, le réseau d’égouttage peut être décrit explicitement. A grande échelle cependant, les zones urbaines sont souvent représentées par des approches moins détaillées. Les modèles actuels prennent généralement en compte les surfaces imperméables par une adaptation des coefficients de ruissellement ou d’infiltration. Cette approche permet de générer des volumes de ruissellement corrects, mais ne permet pas de tenir compte de la modification de la dynamique de transfert des apports liée à la présence de réseaux d’égouttage. Une méthode de modélisation particulière a donc été développée pour tenir compte de ces éléments dans un modèle hydrologique global (WOLF), en quantifiant de façon précise les apports des surfaces imperméables grâce à des données d’occupation du sol en format vectoriel et en les propageant sans devoir implémenter l’entièreté du réseau d’égouttage. Ces développements ont alors été appliqués avec succès sur le bassin de la Berwinne, en Belgique. [less ▲] Detailed reference viewed: 42 (16 ULg) Detailed 2D hydraulic modelling as a support for selecting adaptation measuresErnst, Julien ; Dewals, Benjamin ; Detrembleur, Sylvain et alin Schüttrumpf, Holger (Ed.) Wasserwirtschaft und Klimawandel - Fakten, Folgen und Aufgaben (2009) Detailed reference viewed: 12 (3 ULg)A 2D vertical finite volume solver using a level set approach for simulating free surface incompressible flowsDetrembleur, Sylvain ; Dewals, Benjamin ; Erpicum, Sébastien et alin European Journal of Mechanical and Environmental Engineering (2009), 2009(3), 4-9 Detailed reference viewed: 49 (20 ULg)Modélisation numérique 2D unifiée des écoulements dans une retenue, sur l’évacuateur de crue et en avalDewals, Benjamin ; Erpicum, Sébastien ; Archambeau, Pierre et alin Actes du Colloque Dimensionnement et Fonctionnement des Evacuateurs de crues (2009) Detailed reference viewed: 10 (2 ULg)Flushing operations with limited sediment availabilityDewals, Benjamin ; ; Erpicum, Sébastien et alin Proc. 33rd IAHR Congress: Water Engineering for a Sustainable Environment (2009) Detailed reference viewed: 11 (2 ULg)Continuous formulation for bottom friction in free surface flows modellingMachiels, Olivier ; Erpicum, Sébastien ; Archambeau, Pierre et alin River Basin Management V (2009) Bottom friction modelling is an important step in river flows computation with 1D or 2D solvers. It is usually performed using empirical laws established for uniform flow conditions or a modern approach ... [more ▼] Bottom friction modelling is an important step in river flows computation with 1D or 2D solvers. It is usually performed using empirical laws established for uniform flow conditions or a modern approach based on turbulence analysis. Following the definition of the flow validity field of the main friction laws proposed in the literature, an original continuous formulation has been developed. It is suited to model river flows with a wide range of properties (water depth, discharge, roughness…). The efficiency of this new formulation, theoretically established and numerically adjusted, is demonstrated through various practical applications. [less ▲] Detailed reference viewed: 23 (5 ULg)Etude hydrologique et hydrodynamique du bassin versant de la BerwinneArchambeau, Pierre ; ; Pirotton, Michel Report (2009) Detailed reference viewed: 25 (2 ULg)Etude et modélisation des impacts hydrologiques de pluies exceptionnelles dans un environnement vallonné et boisé - partims hydrologie et hydrauliquesArchambeau, Pierre ; Pirotton, Michel Report (2009) Detailed reference viewed: 18 (3 ULg)Approches numériques et expérimentales en appui à la gestion durable des sédimentsDewals, Benjamin ; Erpicum, Sébastien ; Archambeau, Pierre et alin Proc. Morphodynamique et gestion des sédiments dans les estuaires, les baies et les deltas (2009) Detailed reference viewed: 36 (14 ULg)Dam-break flow numerical modeling considering structural impacts on buildingsErpicum, Sébastien ; Archambeau, Pierre ; Dewals, Benjamin et alin Proc. 33rd IAHR Congress: Water Engineering for a Sustainable Environment (2009) Detailed reference viewed: 8 (1 ULg)Analyse expérimentale du fonctionnement hydraulique des déversoirs en touches de pianoMachiels, Olivier ; Erpicum, Sébastien ; Archambeau, Pierre et alin Actes du Colloque Dimensionnement et Fonctionnement des Evacuateurs de crues (2009) Detailed reference viewed: 39 (2 ULg)Bottom friction formulations for free surface flow modelingMachiels, Olivier ; Erpicum, Sébastien ; Archambeau, Pierre et alin 8th NCTAM Congress (2009) Bottom friction modeling is an important step in river flows computation with 1D or 2D solvers. It is usually performed using empirical laws established for uniform flow conditions or a modern approach ... [more ▼] Bottom friction modeling is an important step in river flows computation with 1D or 2D solvers. It is usually performed using empirical laws established for uniform flow conditions or a modern approach based on turbulence analysis. Following the definition of the flow validity field of the main friction laws proposed in the iterature, an original continuous formulation has been developed. It is suited to model river flows with a high variability of properties (water depth, discharge, roughness…). The efficiency of this new formulation, theoretically established and numerically adjusted, is demonstrated through various practical applications. [less ▲] Detailed reference viewed: 29 (3 ULg)Large scale experimental study of piano key weirsMachiels, Olivier ; Erpicum, Sébastien ; Archambeau, Pierre et alin Proc. 33rd IAHR Congress: Water Engineering for a Sustainable Environment (2009) Piano Key Weirs (PKW) are a new type of weir, showing very good flood release capacities as well as strong economic and structural benefits. However, lacks of understanding persist about the flow ... [more ▼] Piano Key Weirs (PKW) are a new type of weir, showing very good flood release capacities as well as strong economic and structural benefits. However, lacks of understanding persist about the flow conditions on such structures. With the goal to fill some of these lacks, a combined experimental and numerical study has been undertaken at the Laboratory of Structures Hydraulics of the University of Liege. This paper presents the goals and the scientific strategy of this research. The first results of experiments being carried out on a large physical model of PKW are also depicted. These experiments lead to characterization of the flow behavior for low heads and enable to highlight the influence of the crest thickness and the outlet slope on the release capacity. [less ▲] Detailed reference viewed: 103 (4 ULg)Dam Break Flow Modelling and Geographical Distribution of the Roughness CoefficientPaulus, Raphaël ; Ernst, Julien ; Dewals, Benjamin et alin Proc. 33rd IAHR Congress: Water Engineering for a Sustainable Environment (pp. 2429-2436) (2009) Dam break flow modelling is a major field of research. In order to enable risk analysis in the downstream valleys of dams, 2D numerical simulations are of prime interest. These are based on the ... [more ▼] Dam break flow modelling is a major field of research. In order to enable risk analysis in the downstream valleys of dams, 2D numerical simulations are of prime interest. These are based on the conservative set of shallow water equations. Beyond their numerical implementation, the challenge of the computation relies on the ability to handle very huge sets of high-precision data, in order to get the highest possible accuracy, whereas the computational time must remain realistic for simulations carried out on real valleys topography. In this paper, a simulation on about 2 500 000 cells is presented. Particularly, the results are compared and discussed regarding especially the exploitation of landuse data for the roughness. Beyond the examples of validation, the relevance of the developed methodology appears to be essential in the framework of risk analysis. [less ▲] Detailed reference viewed: 74 (34 ULg)A modeling system handling the wide range of time scales involved in sediment transport processesDewals, Benjamin ; Erpicum, Sébastien ; Archambeau, Pierre et alin Proc. 6th International SedNet conference (2009) Detailed reference viewed: 7 (2 ULg)Aéroport Bruxelles Sud - Expertise du réseau d'égouttage relatif au parking à étages - prestations complémentairesPirotton, Michel ; Archambeau, Pierre ; Kerger, François Report (2008) Detailed reference viewed: 10 (1 ULg)Detailed 2D hydrodynamic modelling as an onset for evaluating socio-economic impacts of floodsErnst, Julien ; Dewals, Benjamin ; Detrembleur, Sylvain et alPoster (2008, October 14) Detailed reference viewed: 56 (17 ULg)Improving the Design of Hydraulic Structures : A unified 1D Simulation Tool for Highly Transient Water FlowKerger, François ; Archambeau, Pierre ; Erpicum, Sébastien et alPoster (2008, October 02) Detailed reference viewed: 39 (14 ULg) |
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