Developpement Et Analyse Dune Methode Sans Maillage Pour Les Systemes Hyperboliques Du Premier Ordre

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Développement et analyse d'une méthode sans maillage pour les systèmes hyperboliques du premier ordre

Author : Guillaume Pierrot
Publisher :
ISBN 13 :
Total Pages : 311 pages
Book Rating : 4.:/5 (491 download)

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Book Synopsis Développement et analyse d'une méthode sans maillage pour les systèmes hyperboliques du premier ordre by : Guillaume Pierrot

Download or read book Développement et analyse d'une méthode sans maillage pour les systèmes hyperboliques du premier ordre written by Guillaume Pierrot and published by . This book was released on 2004 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les systèmes hyperboliques interviennent dans de nombreux problèmes physiques tels que la dynamique des gaz et des matériaux super-élastiques, ou bien encore la magnéto-hydrodynamiqueLorsque le domaine d'étude est invariant, les outils numériques traditionnels utilisés pour la simulation de tels systèmes (Différences Finies, Volumes Finis, Eléments Finis) ont prouvé leur efficacité. En revanche lorsqu'il se déforme au cours du temps, elles pâtissent d'un surcoût important dû à nécessité d'adapter la grille au domaine d'étude à chaque instant. Qui plus est, dans le cas de problèmes à très grandes déformations, tels que le déploiement d'un airbag, le remaillage en lui-même pose des problèmes de construction.La méthode sans maillage SPH (Smoothed Particle Hydrodynamics), introduite par Lucy dans les années 70 pour simuler des phénomènes d'astrophysique, vise à palier cet inconvénient en s'affranchissant (dans une certaine mesure) des problèmes liés à la déformation du domaine d'étude. Son analyse mathématique, due à Raviart et Mas-Gallic dans le cadre linéaire et à Vila dans le cadre non-linéaire, a toutefois mis en évidence des conditions de convergence restrictives.L'objet de ce travail est de proposer une nouvelle classe de schémas sans maillage ne souffrant pas des mêmes restrictions. L'optique retenue est de généraliser la méthode des Différences Finies à des nuages de points non structurés et déformables, en adaptant notamment les notions de formule aux différences et de décentrementLa convergence est démontrée dans le cadre linéaire.Enfin, des exemples d'application numérique sont donnés pour le système de la dynamique des gaz.

Résolution numérique des équations de Maxwell harmoniques par une méthode d'éléments finis discontinus

Author : Philippe Helluy
Publisher :
ISBN 13 :
Total Pages : 103 pages
Book Rating : 4.:/5 (49 download)

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Book Synopsis Résolution numérique des équations de Maxwell harmoniques par une méthode d'éléments finis discontinus by : Philippe Helluy

Download or read book Résolution numérique des équations de Maxwell harmoniques par une méthode d'éléments finis discontinus written by Philippe Helluy and published by . This book was released on 1994 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse porte sur la résolution théorique et numérique des équations de Maxwell dans le domaine temporel ou fréquentiel. Dans une première partie, on démontre l'existence et l'unicité mathématique de la solution du problème d'évolution. On s'intéresse également au comportement asymptotique en temps de cette solution lorsque le second membre des équations est sinusoïdal en temps. L'approche utilisée fait appel à la théorie des systèmes hyperboliques linéaires du premier ordre, au théorème de Hille-Yosida, aux principes d'amplitude limite et d'absorption limite, ainsi qu'à des théorèmes de traces (dans le cas du problème aux limites). Dans un second temps, on développe une approximation par éléments finis discontinus du problème fréquentiel, basée sur une décomposition de la matrice des flux en partie positive et négative (méthode de Flux-Splitting). Cette approche autorise l'utilisation de maillages totalement déstructurés. Une étude d'erreur lorsque le pas h du maillage tend vers zéro est proposée. Un algorithme itératif de résolution du problème discret, basé sur une décomposition de domaine sans recouvrement, est ensuite décrit. On démontre sa convergence vers l'unique solution discrète. L'implémentation sur un ordinateur à architecture massivement parallèle (ipsc 860) a été réalisée. Enfin, on construit une équation intégrale adaptée à la méthode, pour la résolution des problèmes en domaine non borné. Des expériences numériques sont décrites dans le cas d'éléments finis de type p#0 (approximation constante par élément).

ETUDE DE SCHEMAS D'ORDRE ELEVE EN VOLUMES FINIS POUR DES PROBLEMES HYPERBOLIQUES. APPLICATION AUX EQUATIONS DE MAXWELL, D'EULER ET AUX ECOULEMENTS DIPHASIQUES DISPERSES

Download ETUDE DE SCHEMAS D'ORDRE ELEVE EN VOLUMES FINIS POUR DES PROBLEMES HYPERBOLIQUES. APPLICATION AUX EQUATIONS DE MAXWELL, D'EULER ET AUX ECOULEMENTS DIPHASIQUES DISPERSES PDF Online Free

Author : Sophie Depeyre
Publisher :
ISBN 13 :
Total Pages : 238 pages
Book Rating : 4.:/5 (869 download)

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Book Synopsis ETUDE DE SCHEMAS D'ORDRE ELEVE EN VOLUMES FINIS POUR DES PROBLEMES HYPERBOLIQUES. APPLICATION AUX EQUATIONS DE MAXWELL, D'EULER ET AUX ECOULEMENTS DIPHASIQUES DISPERSES by : Sophie Depeyre

Download or read book ETUDE DE SCHEMAS D'ORDRE ELEVE EN VOLUMES FINIS POUR DES PROBLEMES HYPERBOLIQUES. APPLICATION AUX EQUATIONS DE MAXWELL, D'EULER ET AUX ECOULEMENTS DIPHASIQUES DISPERSES written by Sophie Depeyre and published by . This book was released on 1997 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: NOUS NOUS SOMMES INTERESSES A LA CONSTRUCTION ET A L'ETUDE D'UNE CLASSE DE SCHEMAS D'ORDRE TROIS OU QUATRE EN TEMPS ET EN ESPACE, BASES SUR DES FORMULATIONS -SHEMAS DE TYPE VOLUMES FINIS OU ELEMENTS FINIS, POUR DES MAILLAGES BIDIMENSIONNELS EN RECTANGLES OU EN TRIANGLES. NOUS CONSIDERONS DANS UN PREMIER TEMPS DES PROBLEMES HYPERBOLIQUES LINEAIRES, COMME L'EQUATION D'ADVECTION ET LE SYSTEME DE MAXWELL. UNE ETUDE DE STABILITE ET DE PRECISION, A L'AIDE DES EQUATIONS EQUIVALENTES A ETE PRESENTEE, AFIN DE COMPARER LES SCHEMAS ET DE RETENIR LES PLUS PRECIS. EN PARTICULIER, POUR LE SYSTEME DE MAXWELL, UNE CONDITION NECESSAIRE ET SUFFISANTE DE STABILITE A ETE DEMONTREE POUR LE SCHEMA DECENTRE D'ORDRE UN, SUR UN MAILLAGE EN RECTANGLES. NOUS AVONS AUSSI PROPOSE UNE NOUVELLE FORMULATION DU SYSTEME DE MAXWELL, EN RAJOUTANT UN TERME DE VISCOSITE DANS LES EQUATIONS, AFIN QUE NOS SCHEMAS PRENNENT MIEUX EN COMPTE LES RELATIONS DE DIVERGENCE. UNE ETUDE DE STABILITE A PERMIS DE DETERMINER LE PARAMETRE DE VISCOSITE N'INTRODUISANT AUCUNE CONTRAINTE SUPPLEMENTAIRE SUR LE PAS DE TEMPS, ET NOUS AVONS MONTRE A L'AIDE DE RESULTATS NUMERIQUES, POURQUOI LA NOUVELLE FORMULATION ETAIT MEILLEURE. DANS LA DEUXIEME PARTIE, NOUS NOUS SOMMES INTERESSES A DES MODELES HYPERBOLIQUES NON LINEAIRES, COMME LES EQUATIONS D'EULER. NOUS AVONS CHERCHE A CONSTRUIRE DES LIMITEURS D'ORDRE ELEVE AFIN DE RENDRE NOS SCHEMAS POSITIFS. EN PARTICULIER, NOUS AVONS PRESENTE UN NOUVEAU LIMITEUR D'ORDRE TROIS, QUI S'EST AVERE STABLE ET ROBUSTE, POUR DES CALCULS DE TUBE A CHOC ET D'ECOULEMENTS TRANSSONIQUES STATIONNAIRES. NOUS AVONS FINALEMENT CONSIDERE UN MODELE EULERIEN D'ECOULEMENT DIPHASIQUE, HYPERBOLIQUE ET CONSERVATIF, COMPORTANT UN TERME SOURCE RAIDE. LA METHODE CLASSIQUE D'INTEGRATION EN TEMPS EST UNE METHODE DE PAS FRACTIONNAIRES ; TOUTEFOIS, ELLE COMPORTE PLUSIEURS FAIBLESSES, ET NOUS AVONS PROPOSE UNE METHODE COUPLEE, QUI S'AVERE PLUS PRECISE LORSQUE LE RAYON DES PARTICULES DEVIENT PETIT.

Sur la résolution des systèmes hyperboliques du premier ordre par des méthodes d'éléments finis

Author : Pierre Lesaint
Publisher :
ISBN 13 :
Total Pages : 216 pages
Book Rating : 4.:/5 (251 download)

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Book Synopsis Sur la résolution des systèmes hyperboliques du premier ordre par des méthodes d'éléments finis by : Pierre Lesaint

Download or read book Sur la résolution des systèmes hyperboliques du premier ordre par des méthodes d'éléments finis written by Pierre Lesaint and published by . This book was released on 1976 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The General Theory of Homogenization

Author : Luc Tartar
Publisher : Springer Science & Business Media
ISBN 13 : 3642051952
Total Pages : 466 pages
Book Rating : 4.6/5 (42 download)

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Book Synopsis The General Theory of Homogenization by : Luc Tartar

Download or read book The General Theory of Homogenization written by Luc Tartar and published by Springer Science & Business Media. This book was released on 2009-12-03 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Homogenization is not about periodicity, or Gamma-convergence, but about understanding which effective equations to use at macroscopic level, knowing which partial differential equations govern mesoscopic levels, without using probabilities (which destroy physical reality); instead, one uses various topologies of weak type, the G-convergence of Sergio Spagnolo, the H-convergence of François Murat and the author, and some responsible for the appearance of nonlocal effects, which many theories in continuum mechanics or physics guessed wrongly. For a better understanding of 20th century science, new mathematical tools must be introduced, like the author’s H-measures, variants by Patrick Gérard, and others yet to be discovered.

Dictionary of Building and Civil Engineering

Author : Don Montague
Publisher : Taylor & Francis
ISBN 13 : 9780419199106
Total Pages : 472 pages
Book Rating : 4.1/5 (991 download)

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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.

Bogoliubov-de Gennes Method and Its Applications

Author : Jian-Xin Zhu
Publisher : Springer
ISBN 13 : 3319313142
Total Pages : 193 pages
Book Rating : 4.3/5 (193 download)

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Book Synopsis Bogoliubov-de Gennes Method and Its Applications by : Jian-Xin Zhu

Download or read book Bogoliubov-de Gennes Method and Its Applications written by Jian-Xin Zhu and published by Springer. This book was released on 2016-06-21 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this book is to provide an elementary yet systematic description of the Bogoliubov-de Gennes (BdG) equations, their unique symmetry properties and their relation to Green’s function theory. Specifically, it introduces readers to the supercell technique for the solutions of the BdG equations, as well as other related techniques for more rapidly solving the equations in practical applications. The BdG equations are derived from a microscopic model Hamiltonian with an effective pairing interaction and fully capture the local electronic structure through self-consistent solutions via exact diagonalization. This approach has been successfully generalized to study many aspects of conventional and unconventional superconductors with inhomogeneities – including defects, disorder or the presence of a magnetic field – and becomes an even more attractive choice when the first-principles information of a typical superconductor is incorporated via the construction of a low-energy tight-binding model. Further, the lattice BdG approach is essential when theoretical results for local electronic states around such defects are compared with the scanning tunneling microscopy measurements. Altogether, these lectures provide a timely primer for graduate students and non-specialist researchers, while also offering a useful reference guide for experts in the field.

Contemporary Criminological Issues

Author : Carolyn Côté-Lussier
Publisher : University of Ottawa Press
ISBN 13 : 0776628720
Total Pages : 396 pages
Book Rating : 4.7/5 (766 download)

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Book Synopsis Contemporary Criminological Issues by : Carolyn Côté-Lussier

Download or read book Contemporary Criminological Issues written by Carolyn Côté-Lussier and published by University of Ottawa Press. This book was released on 2020-05-05 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contemporary Criminological Issues tackles some of today’s most pressing social issues, from the criminalization of Indigenous peoples to interpersonal violence, border control, and armed conflicts. This book advances cutting-edge theories and methods, with the aim of moving beyond the scholarship that reproduces insecurity and exclusion. The breadth of approaches encompasses much of the current critical criminological scholarship, serving as a counterpoint to the growth of managerial and administrative criminologies and the rise of explicitly exclusionary and punitive state policies and practices with respect to ‘crime’ and ‘security.’ This edited collection featuring two books, one in English and one in French, includes important contributions to knowledge and public policy by eminent experts and emerging scholars. This book is published in English.

Finite Volumes for Complex Applications IX - Methods, Theoretical Aspects, Examples

Author : Robert Klöfkorn
Publisher : Springer Nature
ISBN 13 : 3030436519
Total Pages : 727 pages
Book Rating : 4.0/5 (34 download)

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Book Synopsis Finite Volumes for Complex Applications IX - Methods, Theoretical Aspects, Examples by : Robert Klöfkorn

Download or read book Finite Volumes for Complex Applications IX - Methods, Theoretical Aspects, Examples written by Robert Klöfkorn and published by Springer Nature. This book was released on 2020-06-09 with total page 727 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of the 9th conference on "Finite Volumes for Complex Applications" (Bergen, June 2020) are structured in two volumes. The first volume collects the focused invited papers, as well as the reviewed contributions from internationally leading researchers in the field of analysis of finite volume and related methods. Topics covered include convergence and stability analysis, as well as investigations of these methods from the point of view of compatibility with physical principles. Altogether, a rather comprehensive overview is given on the state of the art in the field. The properties of the methods considered in the conference give them distinguished advantages for a number of applications. These include fluid dynamics, magnetohydrodynamics, structural analysis, nuclear physics, semiconductor theory, carbon capture utilization and storage, geothermal energy and further topics. The second volume covers reviewed contributions reporting successful applications of finite volume and related methods in these fields. The finite volume method in its various forms is a space discretization technique for partial differential equations based on the fundamental physical principle of conservation. Many finite volume methods preserve further qualitative or asymptotic properties, including maximum principles, dissipativity, monotone decay of free energy, and asymptotic stability, making the finite volume methods compatible discretization methods, which preserve qualitative properties of continuous problems at the discrete level. This structural approach to the discretization of partial differential equations becomes particularly important for multiphysics and multiscale applications. The book is a valuable resource for researchers, PhD and master’s level students in numerical analysis, scientific computing and related fields such as partial differential equations, as well as engineers working in numerical modeling and simulations.

High Performance Concrete

Author : Y. Malier
Publisher : CRC Press
ISBN 13 : 1351440896
Total Pages : 570 pages
Book Rating : 4.3/5 (514 download)

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Book Synopsis High Performance Concrete by : Y. Malier

Download or read book High Performance Concrete written by Y. Malier and published by CRC Press. This book was released on 2018-05-08 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a thorough review of properties, durability and use of high performance concrete, derived from recent research and experience. This book contains contributions from the leading French, Canadian and Swiss researchers, designers and material specialists, translated into English for the first time.

Singularities in Boundary Value Problems

Author : Pierre Grisvard
Publisher : Springer
ISBN 13 :
Total Pages : 224 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Singularities in Boundary Value Problems by : Pierre Grisvard

Download or read book Singularities in Boundary Value Problems written by Pierre Grisvard and published by Springer. This book was released on 1992 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Livestock Policy Analysis

Author : International Livestock Research Institute
Publisher : ILRI (aka ILCA and ILRAD)
ISBN 13 : 9789291460038
Total Pages : 268 pages
Book Rating : 4.4/5 (6 download)

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Book Synopsis Livestock Policy Analysis by : International Livestock Research Institute

Download or read book Livestock Policy Analysis written by International Livestock Research Institute and published by ILRI (aka ILCA and ILRAD). This book was released on 1995-01-01 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Policy concepts; Identification of policy issues; Production systems, supply and demand; Market, price and trade policies; Marketing and distribution systems; Budget and manpower planning; Land tenure police for the livestock sector; Policy analysis report writing and communication; Livestock production and marketing in alphabeta - a case study.

The Theory of Ionization of Gases by Collision

Author : Sir John Townsend
Publisher :
ISBN 13 :
Total Pages : 112 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis The Theory of Ionization of Gases by Collision by : Sir John Townsend

Download or read book The Theory of Ionization of Gases by Collision written by Sir John Townsend and published by . This book was released on 1910 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Submarine Mass Movements and Their Consequences

Author : Vasilios Lykousis
Publisher : Springer Science & Business Media
ISBN 13 : 1402065124
Total Pages : 407 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Submarine Mass Movements and Their Consequences by : Vasilios Lykousis

Download or read book Submarine Mass Movements and Their Consequences written by Vasilios Lykousis and published by Springer Science & Business Media. This book was released on 2007-09-14 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions from leading researchers in science and engineering, this book provides a global perspective on submarine mass movements and their consequences. Authors report on new findings from fundamental as well as site-specific studies from around the world. All studies relied on the most recent technologies, including multi-beam sonar imaging techniques, 3D seismic analysis, slope stability analysis, debris flow, and tsunami modeling.

Handbook of Continuum Mechanics

Author : Jean Salencon
Publisher : Springer Science & Business Media
ISBN 13 : 3642565425
Total Pages : 794 pages
Book Rating : 4.6/5 (425 download)

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Book Synopsis Handbook of Continuum Mechanics by : Jean Salencon

Download or read book Handbook of Continuum Mechanics written by Jean Salencon and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt: Outstanding approach to continuum mechanics. Its high mathematical level of teaching together with abstracts, summaries, boxes of essential formulae and numerous exercises with solutions, makes this handbook one of most complete books in the area. Students, lecturers, and practitioners will find this handbook a rich source for their studies or daily work.

Applications of the Theory of Plasticity in Soil Mechanics

Author : Jean Salençon
Publisher : John Wiley & Sons
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Applications of the Theory of Plasticity in Soil Mechanics by : Jean Salençon

Download or read book Applications of the Theory of Plasticity in Soil Mechanics written by Jean Salençon and published by John Wiley & Sons. This book was released on 1977 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Advances in Hydroinformatics

Author : Philippe Gourbesville
Publisher : Springer
ISBN 13 : 9812876154
Total Pages : 616 pages
Book Rating : 4.8/5 (128 download)

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Book Synopsis Advances in Hydroinformatics by : Philippe Gourbesville

Download or read book Advances in Hydroinformatics written by Philippe Gourbesville and published by Springer. This book was released on 2015-08-21 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of extended papers based on presentations given during the SIMHYDRO 2014 conference, held in Sophia Antipolis in June 2014. It focuses on the modeling and simulation of fast hydraulic transients, on 3D modeling, and on uncertainties and multiphase flows. The book explores both the limitations and performance of current models and presents the latest developments based on new numerical schemes, high-performance computing, multiphysics and multiscale methods, and better interaction with field or scale model data. It addresses the interests of practitioners, stakeholders, researchers and engineers active in this field.