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Author : Olivier Edder
Publisher :
ISBN 13 :
Total Pages : 174 pages
Book Rating : 4.:/5 (835 download)
Download or read book Modélisation et étude mathématique d'un phénomène de combustion de gouttes written by Olivier Edder and published by . This book was released on 1991 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jean-Paul Zolesio
Publisher : CRC Press
ISBN 13 : 9780824792749
Total Pages : 422 pages
Book Rating : 4.7/5 (927 download)
Download or read book Boundary Control and Variation written by Jean-Paul Zolesio and published by CRC Press. This book was released on 1994-07-28 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the Working Conference on Boundary Control and Boundary Variation held in Sophia-Antipolis, France, this work provides important examinations of shape optimization and boundary control of hyperbolic systems, including free boundary problems and stabilization. It offers a new approach to large and nonlinear variation of the boundary using global Eulerian co-ordinates and intrinsic geometry.
Author : Frédérique Laurent
Publisher :
ISBN 13 :
Total Pages : 266 pages
Book Rating : 4.:/5 (495 download)
Download or read book Modélisation mathématique et numérique de la combustion de brouillards de gouttes polydispersés written by Frédérique Laurent and published by . This book was released on 2002 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: On introduit un modèle multi-fluides eulérien pour décrire l'évolution de sprays polydispersés dans des flammes diphasiques. Nous montrons que ce modèle peut être obtenu à partir d'un niveau cinétique de description. Il peut ainsi prendre en compte des interactions entre gouttes d'inerties différentes, comme la coalescence, ce qui n'avait jamais été fait avec un modèle eulérien. Il est validé par des comparaisons avec des mesures expérimentales pour le cas des sprays dilués sur des configurations de flammes laminaires de diffusion à contre-courant. Il est également comparé numériquement à des méthodes d'échantillonnages dans des cas de sprays dilués ou denses. D'autre part, son analyse numérique est menée dans un cas simplifié où seule subsiste l'évaporation. Cette analyse nous permet d'introduire d'autres méthodes numériques d'ordre arbitrairement élevé pour discrétiser l'espace des phases en taille et décrire l'évaporation. Elle nous permet aussi de considérer la propagation de flammes planes de prémélange, en présence d'un spray polydispersé. Cette configuration est décrite par un système de réaction-diffusion pour un modèle thermo-diffusif du gaz couplé au modèle cinétique du spray. La propagation de telles flammes est décrite par des ondes progressives du système complet. Pour en étudier l'existence, on utilise des méthodes de degré pologique pour des opérateurs elliptiques dans des domaines non bornés. Cependant, le modèle cinétique introduit une EDP hyperbolique. Les résultats d'analyse numérique permettent d'envisager une discrétisation de l'espace des tailles de gouttes, afin de se ramener à un système dynamique de dimension finie. Il reste à ajouter une diffusion dans la partie hyperbolique du système, afin d'obtenir un système elliptique et pouvoir appliquer une méthode de degré topologique. En passant à la limite sur la diffusion, puis sur le pas de discrétisation, on montre l'existence de flamme plane se propageant, en présence d'un spray polydispersé.
Author : Marc Massot
Publisher :
ISBN 13 :
Total Pages : 316 pages
Book Rating : 4.:/5 (494 download)
Download or read book Modelisation mathematique et numerique de la combustion des melanges gazeux written by Marc Massot and published by . This book was released on 1996 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA THESE EST CONSACREE A L'ETUDE MATHEMATIQUE ET NUMERIQUE DES PROBLEMES DE COMBUSTION AVEC UNE CINETIQUE CHIMIQUE COMPLEXE. LE CHAPITRE I EST UN TRAVAIL DE SYNTHESE SUR LA DERIVATION DU SYSTEME DES EQUATIONS QUI REGIT LES MELANGES GAZEUX REACTIF A PARTIR DE LA THEORIE CINETIQUE DES MELANGES DE GAZ DILUES POLYATOMIQUES. UN ENSEMBLE DE PROPRIETES MATHEMATIQUES DU SYSTEME SONT ALORS DEDUITES DE CETTE DERIVATION. L'ENSEMBLE DE CES PROPRIETES PERMET, DANS LE CHAPITRE II, DE SYMETRISER LE SYSTEME PAR PASSAGE AUX VARIABLES ENTROPIQUES LIEES A LA DENSITE D'ENTROPIE PHYSIQUE. CETTE FORME SYMETRIQUE EST EXPLICITE ET COMPATIBLE AVEC LES RELATIONS DE RECIPROCITES DE ONSAGER. NOUS CARACTERISONS L'ENSEMBLES DES FORMES NORMALES DU SYSTEME, SYSTEMES MIXTES HYPERBOLIQUES-PARABOLIQUES ET SYMETRIQUES, OU L'ON A DECOUPLE LES VARIABLES HYPERBOLIQUES DES VARIABLES PARABOLIQUES. DEUX FORMES NORMALES PARTICULIEREMENT SIMPLES SONT EXPLICITEES. NOUS MONTRONS ALORS QUE LE SYSTEME SOUS FORME NORMALE EST BIEN POSE MATHEMATIQUEMENT, AU SENS OU NOUS DEMONTRONS L'EXISTENCE D'UNE SOLUTION UNIQUE AU PROBLEME DE CAUCHY LOCALEMENT EN TEMPS, DANS LE CHAPITRE III, PUIS GLOBALEMENT EN TEMPS AUTOUR D'UN ETAT STATIONNAIRE CONSTANT, DANS LE CHAPITRE V. CES RESULTATS MATHEMATIQUES D'ANALYSE FONCTIONNELLE REPOSENT SUR UNE CONNAISSANCE COMPLETE DES FORMES SYMETRIQUES DU SYSTEME ET SUR L'ETUDE DES ETATS D'EQUILIBRE POUR LA CHIMIE EN JEU DANS CES EQUATIONS, POUR LESQUELS UNE AXIOMATIQUE THERMOCHIMIQUE EST PROPOSEE DANS LE CHAPITRE IV. NOUS EFFECTUONS POUR TERMINER LA RESOLUTION NUMERIQUE DE CE SYSTEME D'EQUATIONS DANS LA CONFIGURATION D'UNE COUCHE DE MELANGE SUPERSONIQUE REACTIVE DANS LE CHAPITRE VII. LE CODE UTILISE EST DE TYPE VOLUMES FINIS EN DIMENSION DEUX D'ESPACE POUR LEQUEL LES FLUX CONVECTIFS SONT EVALUES PAR LA METHODE DES COURBES DE CHOC, AVEC CORRECTION D'ENTROPIE NON PARAMETREE AUX POINTS SONIQUES ET LES COEFFICIENTS DE TRANSPORT, PAR DES BIBLIOTHEQUES DE PROGRAMMES TRES PRECISES. UNE ETUDE FINE DE L'ALLUMAGE ET DU DEVELOPPEMENT DE LA FLAMME DANS UNE COUCHE DE MELANGE AIR-HYDROGENE EST PRESENTEE. NOUS CONCLUONS PAR LA PERSPECTIVE DE L'ETUDE DES PERTURBATIONS D'UNE TELLE COUCHE DE MELANGE PAR SES MODES PROPRES ISSUS DE LA THEORIE DE L'INSTABILITE LINEAIRE
Author : Bernard Larrouturou
Publisher :
ISBN 13 : 9782726104750
Total Pages : 376 pages
Book Rating : 4.1/5 (47 download)
Download or read book Etude mathématique et modélisation numérique de phénomènes de combustion written by Bernard Larrouturou and published by . This book was released on 1987 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: A l'aide de différents modèles décrivant la combustion d'un mélange gazeux réactif dans une configuration géométrique simple monodimensionnelle ou bidimensionnelle, on étudie la propagation d'une flamme dans un mélange gazeux contenu dans un tube infini, et les phénomènes qui lui sont liés: accrochage du front de flamme par point chaud, extinction par des pertes de chaleur ou apparition d'instabilites
Author : Olivier Orlandi
Publisher :
ISBN 13 :
Total Pages : 160 pages
Book Rating : 4.:/5 (492 download)
Download or read book Modélisation et simulation n umérique de la combustion d'une goutte isolée d'aluminium written by Olivier Orlandi and published by . This book was released on 2002 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'ajout de particules d'aluminium permet une augmentation significative des performances d'un moteur à propergol solide. L'objet de cette thèse porte sur l'étude de la combustion d'une goutte d'aluminium afin de mieux appréhender les phénomènes physiques, notamment dans le cadre du propergol pour le lanceur Ariane 5. Une première phase permet de valider les outils numériques et de définir les modèles physiques qui sont utilisés dans le code d'aérodynamique MSD. On évalue ainsi un schéma réactionnel, les phénomènes de transport et l'aérodynamique autour d'une goutte. La simulation numérique met en évidence une combustion avec une flamme de diffusion dans les ambiances gaz de propergol ou air. Les temps de combustion estimés tendent à trouver une loi d2. La nature des gaz est un paramètre influent. Une goutte brûle plus vite dans l'air que dans des gaz de propergol. L'augmentation de la température a pour effet de favoriser la combustion. Une influence similaire, mais en moindre proportion, est observée pour la pression.
Author : AHMED.. BENTAIB
Publisher :
ISBN 13 :
Total Pages : 178 pages
Book Rating : 4.:/5 (49 download)
Download or read book ETUDE MATHEMATIQUE ET NUMERIQUE D'UN MODELE DE COMBUSTION TURBULENTE written by AHMED.. BENTAIB and published by . This book was released on 1993 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE BUT DE CETTE THESE EST L'ETUDE MATHEMATIQUE ET NUMERIQUE D'UN MODELE DE COMBUSTION TURBULENTE. ELLE COMPREND UNE PARTIE INTRODUCTIVE DES MODELES DE TURBULENCE ET DE COMBUSTION TURBULENTE. DANS LE DEUXIEME CHAPITRE, ON PRESENTE L'ETUDE MATHEMATIQUE DU MODELE MIL. UN THEOREME D'EXISTENCE ET D'UNICITE Y EST EXPOSE. LE TROISIEME CHAPITRE FAIT LE POINT SUR L'ETAT DE L'ART EN MATIERE DES METHODES DE VOLUMES FINIS. UN ALGORITHME, EN VOLUMES FINIS NON STRUCTURES POUR LA RESOLUTION DU SYSTEME DES EQUATIONS DE NAVIER-STOKES COUPLE AUX MODELES K-EPSILON ET MIL, EST DECRIT AU QUATRIEME CHAPITRE. LES RESULTATS DES EXPERIENCES NUMERIQUES OBTENUS AVEC CET ALGORITHME SONT PRESENTES AU DERNIER CHAPITRE
Author : Guan Heng Yeoh
Publisher : Butterworth-Heinemann
ISBN 13 : 0080982336
Total Pages : 385 pages
Book Rating : 4.0/5 (89 download)
Download or read book Multiphase Flow Analysis Using Population Balance Modeling written by Guan Heng Yeoh and published by Butterworth-Heinemann. This book was released on 2013-08-19 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by leading multiphase flow and CFD experts, this book enables engineers and researchers to understand the use of PBM and CFD frameworks. Population balance approaches can now be used in conjunction with CFD, effectively driving more efficient and effective multiphase flow processes. Engineers familiar with standard CFD software, including ANSYS-CFX and ANSYS–Fluent, will be able to use the tools and approaches presented in this book in the effective research, modeling and control of multiphase flow problems. - Builds a complete understanding of the theory behind the application of population balance models and an appreciation of the scale-up of computational fluid dynamics (CFD) and population balance modeling (PBM) to a variety of engineering and industry applications in chemical, pharmaceutical, energy and petrochemical sectors - The tools in this book provide the opportunity to incorporate more accurate models in the design of chemical and particulate based multiphase processes - Enables readers to translate theory to practical use with CFD software
Author : Michel Dudeck
Publisher :
ISBN 13 :
Total Pages : 200 pages
Book Rating : 4.:/5 (49 download)
Download or read book Interfaces fluide-fluide written by Michel Dudeck and published by . This book was released on 1988 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Trong T. Bui
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (317 download)
Download or read book A Parallel Finite Volume Algorithm for Large-eddy Simulation of Turbulent Flows written by Trong T. Bui and published by . This book was released on 1998 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bruno Voituriez
Publisher : UNESCO
ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.:/5 (318 download)
Download or read book El Niño written by Bruno Voituriez and published by UNESCO. This book was released on 2000 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: El Nino, caprice of the heavens, scapegoat for every calamity? The general public cannot really understand what is behind the El Nino phenomenon. The book offers a tour of the Earth's climate to understand one of its normal but extreme components.
Author : Linda Strande
Publisher : IWA Publishing
ISBN 13 : 1780404735
Total Pages : 428 pages
Book Rating : 4.7/5 (84 download)
Download or read book Faecal Sludge Management written by Linda Strande and published by IWA Publishing. This book was released on 2014-08-15 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
Author : Philippe Gourbesville
Publisher : Springer
ISBN 13 : 9812876154
Total Pages : 616 pages
Book Rating : 4.8/5 (128 download)
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.
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)
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.
Author : Jacques Lafontaine
Publisher : Springer
ISBN 13 : 3319207350
Total Pages : 408 pages
Book Rating : 4.3/5 (192 download)
Download or read book An Introduction to Differential Manifolds written by Jacques Lafontaine and published by Springer. This book was released on 2015-07-29 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an introduction to differential manifolds. It gives solid preliminaries for more advanced topics: Riemannian manifolds, differential topology, Lie theory. It presupposes little background: the reader is only expected to master basic differential calculus, and a little point-set topology. The book covers the main topics of differential geometry: manifolds, tangent space, vector fields, differential forms, Lie groups, and a few more sophisticated topics such as de Rham cohomology, degree theory and the Gauss-Bonnet theorem for surfaces. Its ambition is to give solid foundations. In particular, the introduction of “abstract” notions such as manifolds or differential forms is motivated via questions and examples from mathematics or theoretical physics. More than 150 exercises, some of them easy and classical, some others more sophisticated, will help the beginner as well as the more expert reader. Solutions are provided for most of them. The book should be of interest to various readers: undergraduate and graduate students for a first contact to differential manifolds, mathematicians from other fields and physicists who wish to acquire some feeling about this beautiful theory. The original French text Introduction aux variétés différentielles has been a best-seller in its category in France for many years. Jacques Lafontaine was successively assistant Professor at Paris Diderot University and Professor at the University of Montpellier, where he is presently emeritus. His main research interests are Riemannian and pseudo-Riemannian geometry, including some aspects of mathematical relativity. Besides his personal research articles, he was involved in several textbooks and research monographs.
Author : P. M. Banks
Publisher : Elsevier
ISBN 13 : 1483260666
Total Pages : 445 pages
Book Rating : 4.4/5 (832 download)
Download or read book Aeronomy written by P. M. Banks and published by Elsevier. This book was released on 2013-09-24 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aeronomy, Part A is an attempt to make a comprehensive exposition of the processes in aeronomy, the study of composition, movement, and thermal balance of the upper regions of the planetary atmosphere. The text covers topics such as atmospheric regions and atmospheric density, the temperature and molecular mass of the atmosphere; the permanent constituents and the molecular and isotonic composition of the homosphere; and the transition from the homosphere to the heterosphere. Also covered are topics such as the temperature gradient and energies in the thermosphere, conditions at 200km and above 250km, solar radiation and ionization, and aeronomic reactions. The book is recommended for scientists, especially natural physicists, who would like to know more about the field of aeronomy and its advances.
Author : W. Petruk
Publisher : Elsevier
ISBN 13 : 0080527337
Total Pages : 287 pages
Book Rating : 4.0/5 (85 download)
Download or read book Applied Mineralogy in the Mining Industry written by W. Petruk and published by Elsevier. This book was released on 2000-11-29 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Techniques of performing applied mineralogy investigations, and applications and capabilities of recently developed instruments for measuring mineral properties are explored in this book intended for practicing applied mineralogists, students in mineralogy and metallurgy, and mineral processing engineers. The benefits of applied mineralogy are presented by using in-depth applied mineralogy studies on base metal ores, gold ores, porphyry copper ores, iron ores and industrial minerals as examples. The chapter on base metal ores includes a discussion on the effects of liberation, particle sizes and surfaces coatings of Pb, Cu, Fe, Ca and So4- on the recoveries of sphalerite, galena and chalcopyrite. The chapter on gold discusses various methods of determining the quantities of gold in different minerals, including 'invisible' gold in pyrite and arsenopyrite, so that a balance of the distribution of gold among the minerals can be calculated. This book also discusses the roles of pyrite, oxygen, moisture and bacterial (thiobacillus ferrooxidans) on reactions that produce acidic drainage from tailings piles, and summarizes currently used and proposed methods of remediation of acidic drainage.
