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Changement Dechelle Sequentiel Pour Des Milieux Poreux Fractures Heterogenes
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Book Synopsis Changement d'échelle séquentiel pour des milieux poreux fracturés hétérogènes by : Moussa Kfoury
Download or read book Changement d'échelle séquentiel pour des milieux poreux fracturés hétérogènes written by Moussa Kfoury and published by . This book was released on 2004 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Étude du problème d'homogénéisation des équations d'écoulements monophasiques faiblement compressibles au sein des milieux fracturés hétérogènes à grande échelle. La présence de fractures crée une discontinuité et une anisotropie des propriétés hydrauliques globales du milieu, provoque une forte localisation des écoulements et complique la tâche d'homogénéisation du milieu étudié. Notre but est d'homogénéiser les équations de bilan à différentes échelles d'observations en partant des équations de Darcy à l'échelle locale. Nous distinguons trois échelles d'observation : l'échelle locale qui correspond à l'ouverture des fractures, l'échelle intermédiaire nommée unité et l'échelle bloc qui correspond à une maille numérique du réservoir. Une première stratégie consiste à calculer dans une première phase les propriétés équivalentes à l'échelle bloc.Une seconde stratégie consiste à calculer en une seule étape les propriétés équivalentes à l'échelle unité et puis à moyenner dans une deuxième phase le comportement des unités, dont les équations sont basées sur un modèle double milieu, à l'échelle du bloc. Pour assurer la deuxième phase du changement d'échelle séquentiel, nous étions amené à écrire un nouveau modèle double milieu à l'échelle bloc en moyennant le modèle double milieu reformulé par Quintard et Whitaker (1996) à l'échelle unité. Pour déterminer les paramètres pétrophysiques (perméabilité et coefficient d'échange) qui découlent des différents modèles d'écoulement, nous avons développé différentes techniques analytique, probabiliste, perturbative et numérique. Les différents résultats obtenus par le biais de ces différentes méthodes nous amènent à une discussion ouverte concernant les limites de validité de chacune de ces approches. Le raccordement des deux stratégies directe et séquentielle nous offre des informations importantes sur la taille du Volume Elémentaire Représentatif (VER)lié à la notion de percolation. Nous établissons une méthodologie de prédiction et de confirmation du VER. En outre, nous montrons que nous pouvons déterminer l'ensemble des éléments d'un tenseur effectif complet de perméabilité à l'aide d'écoulements confinés.
Book Synopsis Dissolution et déposition dans les milieux poreux fracturés by : Samir Békri
Download or read book Dissolution et déposition dans les milieux poreux fracturés written by Samir Békri and published by . This book was released on 1995 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse a pour but d'étudier, à l'échelle microscopique, l'influence des phénomènes de dissolution et de déposition sur l'evolution locale de la géométrie et des milieux poreux fracturés. Ces processus sont abordés dans la limite où le changements de géométrie dues à la dissolution/déposition sont lents devant la vitesse moyenne du fluide. Deux codes de calcul utilisant deux shémas numériques de principes totalement différents, l'un basé sur la methode des marches aléatoires et l'autre sur un formalisme aux différences finies sonts développés; ils tiennent compte de la convection, de la diffusion, de la dissolution/ déposition aux parois et des variations de géométrie qui en découlent; ils sont opérationnels sur n'importe quel type de géomérie modelisée par un empliement de cubes élémentaires fluides ou solides. Les milieux poreux et fracturés que nous avons examiné sont supposés être constitués par la juxtaposition périodique de cellules unités identiques. Le contenu de cette cellule unité représente tout le caractère aléatoire du matériau. Deux paramètres clés caractérisent le régime du porcessus de dissolution et de déposition, le nombre de Péclet (Pe) qui compare les importances des modes de transport convectif et diffusif et le produit du nombre de Péclet et de Damkhöler (Pe.Da) qui compare les temps caractéristique de la réaction à la paroi et du transport diffusif. Trois régimes principaux sont distingués. Qaund le processus est limité par la réaction (Pe.DA“1), la dissolution et la déposition se produisent uniformément le long de l'interface solide liquide. Dans le cas inverse (Pe.Da”1) où le processus est limité par le transport, la dissolution et la déposition dépendent fortement du mode de transport dominant. Si le transport diffusif est prédominant (Pe1), la dissolution et la déposition se produisent dans les zones où l'espace des pores est large. Si le transport convectif est prédominant (Pe1), la dissolution et la déposition se produisent dans les régions où l'écoulement est intense. dans ce dernier cas la dissolution comme la déposition sont dissymétriques et plus rapide en amont des obstacles. Dans le cadre de ce travail, seul le problème local a été considéré. On a déterminé les variations de la géométrie du milieu dues à la dissolution/déposition, et les variations des quantités macroscopiques utiles dans le cadre d'une étude décrivant ces phénomènes à la grande échelle. Finalement, on a examiné la dissolution à la grande échelle dans le cas d'un exemple particulier. Une approche de type couche limite est utilisée.
Book Synopsis Mechanics of Random and Multiscale Microstructures by : Dominique Jeulin
Download or read book Mechanics of Random and Multiscale Microstructures written by Dominique Jeulin and published by Springer. This book was released on 2014-05-04 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews recent theoretical, computational and experimental developments in mechanics of random and multiscale solid materials. The aim is to provide tools for better understanding and prediction of the effects of stochastic (non-periodic) microstructures on materials’ mesoscopic and macroscopic properties. Particular topics involve a review of experimental techniques for the microstructure description, a survey of key methods of probability theory applied to the description and representation of microstructures by random modes, static and dynamic elasticity and non-linear problems in random media via variational principles, stochastic wave propagation, Monte Carlo simulation of random continuous and discrete media, fracture statistics models, and computational micromechanics.
Book Synopsis Soils and Sediments by : Helene Paquet
Download or read book Soils and Sediments written by Helene Paquet and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clays and soils are of great importance in various scientific fields, such as agriculture and environmental science, and in mineral deposits. Students and close collaborators of Georges Millot, the eminent French clay sedimentologist, have put together a book with topics ranging from weathering processes and diagenetic evalution of sediments to sedimentary mineral deposits. The book is of interest to practitioners, advanced students as well as teachers in the above fields.
Book Synopsis Dictionary of Building and Civil Engineering by : Don Montague
Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Author :Roussos Dimitrakopoulos Publisher :Springer Science & Business Media ISBN 13 :9401108242 Total Pages :513 pages Book Rating :4.4/5 (11 download)
Book Synopsis Geostatistics for the Next Century by : Roussos Dimitrakopoulos
Download or read book Geostatistics for the Next Century written by Roussos Dimitrakopoulos and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: To honour the remarkable contribution of Michel David in the inception, establishment and development of Geostatistics, and to promote the essence of his work, an international Forum entitled Geostatistics for the Next Century was convened in Montreal in June 1993. In order to enhance communication and stimulate geostatistical innovation, research and development, the Forum brought together world leading researchers and practitioners from five continents, who discussed-debated current problems, new technologies and futuristic ideas. This volume contains selected peer-reviewed papers from the Forum, together with comments by participants and replies by authors. Although difficult to capture the spontaneity and range of a debate, comments and replies should further assist in the promotion of ideas, dialogue and criticism, and are consistent with the spirit of the Forum. The contents of this volume are organized following the Forum's thematic sessions. The role of theme sessions was not only to stress important topics of tOday but in addition, to emphasize common ground held among diverse areas of geostatistical work and the need to strengthen communication between these areas. For this reason, any given section of this book may include papers from theory to applications, in mining, petroleum, environment, geohydrology, image processing.
Book Synopsis Space, Structure and Randomness by : Michel Bilodeau
Download or read book Space, Structure and Randomness written by Michel Bilodeau and published by Springer Science & Business Media. This book was released on 2007-12-23 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: Space, structure, and randomness: these are the three key concepts underlying Georges Matheron’s scientific work. He first encountered them at the beginning of his career when working as a mining engineer, and then they resurfaced in fields ranging from meteorology to microscopy. What could these radically different types of applications possibly have in common? First, in each one only a single realisation of the phenomenon is available for study, but its features repeat themselves in space; second, the sampling pattern is rarely regular, and finally there are problems of change of scale. This volume is divided in three sections on random sets, geostatistics and mathematical morphology. They reflect his professional interests and his search for underlying unity. Some readers may be surprised to find theoretical chapters mixed with applied ones. We have done this deliberately. GM always considered that the distinction between the theory and practice was purely academic. When GM tackled practical problems, he used his skill as a physicist to extract the salient features and to select variables which could be measured meaningfully and whose values could be estimated from the available data. Then he used his outstanding ability as a mathematician to solve the problems neatly and efficiently. It was his capacity to combine a physicist’s intuition with a mathematician’s analytical skills that allowed him to produce new and innovative solutions to difficult problems. The book should appeal to graduate students and researchers working in mathematics, probability, statistics, physics, spatial data analysis, and image analysis. In addition it will be of interest to those who enjoy discovering links between scientific disciplines that seem unrelated at first glance. In writing the book the contributors have tried to put GM’s ideas into perspective. During his working life, GM was a genuinely creative scientist. He developed innovative concepts whose usefulness goes far beyond the confines of the discipline for which they were originally designed. This is why his work remains as pertinent today as it was when it was first written.
Book Synopsis Mechanics of Porous Media by : Philippe Charlez
Download or read book Mechanics of Porous Media written by Philippe Charlez and published by CRC Press. This book was released on 1995-01-01 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work presents the lecture notes of the 1994 Mechanics of Porous Media Summer School. Chapters cover theoretical basics, methods for measuring poroelastic coefficients, numerical implementation and applications.
Book Synopsis Environmental Soil Remediation and Rehabilitation by : Eric D. van Hullebusch
Download or read book Environmental Soil Remediation and Rehabilitation written by Eric D. van Hullebusch and published by Springer Nature. This book was released on 2020-04-22 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of innovative remediation techniques and strategies for soils contaminated by heavy metals or organic compounds (e.g. petroleum hydrocarbons, NAPLs and chlorinated organic compounds). It discusses various novel chemical remediation approaches (in-situ and ex-situ) used alone and in combination with physical and/or thermal treatment. Further, it addresses the recovery of NAPLs, reuse of leaching solutions, and in-situ chemical reduction and oxidation, and explores the chemical enhancement of physical NAPLs recovery from both practical and theoretical perspectives. Also presenting the state-of-the-art in waste-assisted bioremediation to improve soil quality and the remediation of petroleum hydrocarbons, the book is a valuable resource for students, researchers and R&D professionals in industry engaged in the treatment of contaminated soils.
Book Synopsis Rock Fractures and Fluid Flow by : National Research Council
Download or read book Rock Fractures and Fluid Flow written by National Research Council and published by National Academies Press. This book was released on 1996-08-27 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific understanding of fluid flow in rock fracturesâ€"a process underlying contemporary earth science problems from the search for petroleum to the controversy over nuclear waste storageâ€"has grown significantly in the past 20 years. This volume presents a comprehensive report on the state of the field, with an interdisciplinary viewpoint, case studies of fracture sites, illustrations, conclusions, and research recommendations. The book addresses these questions: How can fractures that are significant hydraulic conductors be identified, located, and characterized? How do flow and transport occur in fracture systems? How can changes in fracture systems be predicted and controlled? Among other topics, the committee provides a geomechanical understanding of fracture formation, reviews methods for detecting subsurface fractures, and looks at the use of hydraulic and tracer tests to investigate fluid flow. The volume examines the state of conceptual and mathematical modeling, and it provides a useful framework for understanding the complexity of fracture changes that occur during fluid pumping and other engineering practices. With a practical and multidisciplinary outlook, this volume will be welcomed by geologists, petroleum geologists, geoengineers, geophysicists, hydrologists, researchers, educators and students in these fields, and public officials involved in geological projects.
Book Synopsis Advances in Groundwater Hydrology by : American Water Resources Association
Download or read book Advances in Groundwater Hydrology written by American Water Resources Association and published by . This book was released on 1976 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ecritures digitales by : Claire Clivaz
Download or read book Ecritures digitales written by Claire Clivaz and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecritures digitales aims to demonstrate how digital writing, as new technology, contributes to the emergence of a reconfigured relationship between the human body and the machines, and how this transition influences the Jewish-Christian textual corpus referred to as "the Scriptures". Ecritures digitales souhaite démontrer de quelle manière l'écriture digitale, en tant que nouvelle technologie, contribue à l'émergence d'une relation innovante entre le corps humain et les machines, et influence le corpus textuel judéo-chrétien désigné comme «les Ecritures».
Book Synopsis Nanomaterials and Nanochemistry by : C. Bréchignac
Download or read book Nanomaterials and Nanochemistry written by C. Bréchignac and published by Springer Science & Business Media. This book was released on 2008-01-01 with total page 753 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here is a brilliant book that covers the major aspects of nanomaterials production. It integrates the many and varied chemical, material and thermo-dynamical facets of production, offering readers a new and unique approach to the subject. The mechanical, optical, and magnetic characteristics of nanomaterials are also presented in detail. Nanomaterials are a fast developing field of research and this book serves as both a reference work for researchers and a textbook for graduate students.
Book Synopsis How to Effectively Recover Free Product at Leaking Underground Storage Tank Sites by :
Download or read book How to Effectively Recover Free Product at Leaking Underground Storage Tank Sites written by and published by . This book was released on 1996 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hydromechanics by : Emmanuil G. Sinaiski
Download or read book Hydromechanics written by Emmanuil G. Sinaiski and published by John Wiley & Sons. This book was released on 2011-04-27 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by an experienced author with a strong background in applications of this field, this monograph provides a comprehensive and detailed account of the theory behind hydromechanics. He includes numerous appendices with mathematical tools, backed by extensive illustrations. The result is a must-have for all those needing to apply the methods in their research, be it in industry or academia.
Book Synopsis Statistical Applications in the Earth Sciences by : F. P. Agterberg
Download or read book Statistical Applications in the Earth Sciences written by F. P. Agterberg and published by Energy, Mines and Resources Canada. This book was released on 1990 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collection of papers presented at the Colloquium, covering the broad subject areas of spatial data integration, statistical analysis of geoscience data, and quantitative stratigraphy. Working Group reports are included as well.
Download or read book Neural Networks written by Raul Rojas and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neural networks are a computing paradigm that is finding increasing attention among computer scientists. In this book, theoretical laws and models previously scattered in the literature are brought together into a general theory of artificial neural nets. Always with a view to biology and starting with the simplest nets, it is shown how the properties of models change when more general computing elements and net topologies are introduced. Each chapter contains examples, numerous illustrations, and a bibliography. The book is aimed at readers who seek an overview of the field or who wish to deepen their knowledge. It is suitable as a basis for university courses in neurocomputing.
