Modélisation 3D Des Écoulements Et Du Transport Solide Dans Un Bassin À Cavités PDF Download
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Author: Yi Liu
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
The investigation on sediment transport in tanks is mainly for optimizing the design of tank in stormwater system and sewers. The flow pattern is the primary factor controlling the movement of particle. Therefore, the emphasis of this investigation is to determine the flow pattern and estimate the deposition of particle. Both computational fluid dynamics and experimental methods are applied to accomplish the research. Numerical simulation are processed by using three different geometries, where a volume of fluid model is applied for tracking the free-surface and a discrete phase model is used for calculation of particle trajectory, and an user defined function based on Shields curve is implemented to the boundary for improving the simulation on sedimentation. A series of experiments are carried out in a rectangular tank with a cavity, where velocity measurements are finished for experiments under different conditions and the sediment deposition is recorded. The comparison between numerical simulation and experimental results show better agreement in the prediction of flow, the improvement on particle deposition needs further modification in the particle tracking model.
Author: Yi Liu
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
The investigation on sediment transport in tanks is mainly for optimizing the design of tank in stormwater system and sewers. The flow pattern is the primary factor controlling the movement of particle. Therefore, the emphasis of this investigation is to determine the flow pattern and estimate the deposition of particle. Both computational fluid dynamics and experimental methods are applied to accomplish the research. Numerical simulation are processed by using three different geometries, where a volume of fluid model is applied for tracking the free-surface and a discrete phase model is used for calculation of particle trajectory, and an user defined function based on Shields curve is implemented to the boundary for improving the simulation on sedimentation. A series of experiments are carried out in a rectangular tank with a cavity, where velocity measurements are finished for experiments under different conditions and the sediment deposition is recorded. The comparison between numerical simulation and experimental results show better agreement in the prediction of flow, the improvement on particle deposition needs further modification in the particle tracking model.
Author: Matthieu François Daniel Dufresne
Publisher:
ISBN:
Category :
Languages : fr
Pages : 226
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Book Description
En assainissement, la connaissance du transport solide est indispensable au choix des dimensions et à l’exploitation d’un bassin ; elle passe par la détermination préalable de l’écoulement. Pour y parvenir, expérimentation et modélisation numérique forment deux approches complémentaires. Les objectifs de cette thèse sont de tester, améliorer puis appliquer un modèle numérique de suivi de particules. En expérimentation, nous avons collecté une vaste banque de données sur l’écoulement et le transport solide (efficacité et localisation des dépôts) dans un pilote expérimental rectangulaire équipé d’une conduite d’entrée, d’une conduite de sortie et d’un trop-plein. Pour la modélisation numérique, nous avons utilisé un code de calcul commercial ; nous proposons pour le suivi de particules une nouvelle condition limite fondée sur le seuillage de l’énergie cinétique turbulente sur le fond du bassin. Le modèle numérique d’écoulement et de transport solide a été testé sur les données expérimentales pour définir son champ d’application, puis appliqué à un ouvrage grandeur nature. Enfin, nous avons trouvé des critères géométriques de prévision de l’écoulement dans les bassins rectangulaires.
Author: Sung-Ho Lee
Publisher:
ISBN:
Category :
Languages : fr
Pages : 310
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Book Description
CETTE THESE PRESENTE UNE RECHERCHE EN MODELISATION NUMERIQUE DU TRANSPORT SOLIDE EN ECOULEMENT NON-PERMANENT, AVEC APPLICATION A LA RETENUE DE BELLEY, SUR LE RHONE. UN MODELE PUREMENT HYDRAULIQUE EST D'ABORD TESTE AVEC SUCCES AVEC LE COEFFICIENT DE MANNING DETERMINE SOIT PAR LA METHODE DU SOIL CONSERVATION SERVICE, SOIT PAR LA METHODE DES PHOTOGRAPHIES, SOIT PAR LA METHODE DE VAN RIJN. LA GEOMETRIE PARTICULIERE DU MARAIS DE CRESSIN (SITUE AU MILIEU DE LA RETENUE) NOUS A OBLIGE A MODELISER UNE MAILLE AU MILIEU DE NOTRE MODELE. LE TRANSPORT SOLIDE DANS LA RETENUE EST MODELISE AVEC IMPOSITION DES CONDITIONS ADEQUATES AUX NUDS DE LA MAILLE ET EN UTILISANT LE TERME D'ECHANGE COUCHE DE FOND/COUCHE DE SURFACE. LE COEFFICIENT DE MANNING EST RECALCULE A CHAQUE PAS DE TEMPS PAR LA METHODE DE VAN RIJN. D'APRES RESULTATS NUMERIQUES DANS NOTRE CAS, LES SEDIMENTS TRES FINS (D=5 M) NE FONT QUE TRANSITER PAR LA RETENUE, TANDIS QUE LES PLUS GROS (D=30 M) SE DEPOSENT PRESQUE EN TOTALITE DANS LA RETENUE. LE BILAN GLOBAL DEPOT/ENTREE=0,4 SE COMPARE FAVORABLEMENT AVEC LES MESURES (DEPOT/ENTREE=0,49, VALEUR MESUREE EN 1990)
Author: Télesphore Sime-Ngando
Publisher: Springer
ISBN: 9783319820026
Category : Science
Languages : en
Pages : 421
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Book Description
This book represents the first multidisciplinary scientific work on a deep volcanic maar lake in comparison with other similar temperate lakes. The syntheses of the main characteristics of Lake Pavin are, for the first time, set in a firmer footing comparative approach, encompassing regional, national, European and international aquatic science contexts. It is a unique lake because of its permanently anoxic monimolimnion, and furthermore, because of its small surface area, its substantially low human influence, and by the fact that it does not have a river inflow. The book reflects the scientific research done on the general limnology, history, origin, volcanology and geological environment as well as on the geochemistry and biogeochemical cycles. Other chapters focus on the biology and microbial ecology whereas the sedimentology and paleolimnology are also given attention. This volume will be of special interest to researchers and advanced students, primarily in the fields of limnology, biogeochemistry, and aquatic ecology.
Author: Hermann Schlichting (Deceased)
Publisher: Springer
ISBN: 366252919X
Category : Technology & Engineering
Languages : en
Pages : 814
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Book Description
This new edition of the near-legendary textbook by Schlichting and revised by Gersten presents a comprehensive overview of boundary-layer theory and its application to all areas of fluid mechanics, with particular emphasis on the flow past bodies (e.g. aircraft aerodynamics). The new edition features an updated reference list and over 100 additional changes throughout the book, reflecting the latest advances on the subject.
Author: Thierry Bourbié
Publisher: Editions TECHNIP
ISBN: 9782710805168
Category : Science
Languages : en
Pages : 366
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Book Description
Author: Leslie Rainer
Publisher: Getty Publications
ISBN: 1606060430
Category : Architecture
Languages : fr
Pages : 438
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Book Description
Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.
Author: International Atomic Energy Agency
Publisher: International Atomic Energy Agency
ISBN: 9789201063205
Category : Technology & Engineering
Languages : en
Pages : 72
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Book Description
This publication results from a technical meeting on phenomenology and technologies relevant to in-vessel melt retention (IVMR) and ex-vessel corium cooling (EVCC). The purpose of the publication is to capture the state of knowledge, at the time of that meeting, related to phenomenology and technologies as well as the challenges and pending issues relevant to IVMR and EVCC for water cooled reactors by summarizing the information provided by the meeting participants in a form useful to practitioners in Member States.
Author: Wilhelmina F. Jashemski
Publisher: Cambridge University Press
ISBN: 1108327036
Category : Art
Languages : en
Pages : 656
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Book Description
In Gardens of the Roman Empire, the pioneering archaeologist Wilhelmina F. Jashemski sets out to examine the role of ancient Roman gardens in daily life throughout the empire. This study, therefore, includes for the first time, archaeological, literary, and artistic evidence about ancient Roman gardens across the entire Roman Empire from Britain to Arabia. Through well-illustrated essays by leading scholars in the field, various types of gardens are examined, from how Romans actually created their gardens to the experience of gardens as revealed in literature and art. Demonstrating the central role and value of gardens in Roman civilization, Jashemski and a distinguished, international team of contributors have created a landmark reference work that will serve as the foundation for future scholarship on this topic. An accompanying digital catalogue will be made available at: www.gardensoftheromanempire.org.
Author: Manuel Fernández-Götz
Publisher: Oxbow Books Limited
ISBN: 9781782977230
Category : Cities and towns, Ancient
Languages : en
Pages : 0
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Book Description
The 21 papers in this volume cover the whole Iron Age from ca. 800 BC to the beginning of the Common Era, exploring the origins of urbanism.
