Download or read book Contribution l tude d un fluide visqueux en oscillation autour d un cylindre fixe written by Gilles Prunier and published by . This book was released on 1974 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quelques aspects de l coulement d un fluide visqueux autour d une bulle d formable written by Armando Blanco Alvarez and published by . This book was released on 1995 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL EST CONSACRE A L'ETUDE, PAR SIMULATION DIRECTE, DE QUELQUES ECOULEMENTS DE FLUIDE VISQUEUX ET INCOMPRESSIBLE AUTOUR D'UNE BULLE DEFORMABLE. LES EQUATIONS DE NAVIER-STOKES AXISYMETRIQUES INSTATIONNAIRES SONT RESOLUES NUMERIQUEMENT EN VARIABLES PRIMITIVES EN UTILISANT DES MAILLAGES CURVILIGNES ORTHOGONAUX OBTENUS A PARTIR DE LA RESOLUTION D'UN COUPLE D'EQUATIONS DE LAPLACE GENERALISEES. LES EQUATIONS DU MOUVEMENT SONT DISCRETISEES EN UTILISANT UNE METHODE DE VOLUMES FINIS ET DES MAILLAGES DECALES. L'AVANCEMENT TEMPOREL DE LA SOLUTION EST OBTENU PAR UNE METHODE A PAS FRACTIONNAIRES DE TYPE RUNGE-KUTTA/CRANK-NICOLSON. UN ALGORITHME ORIGINAL EST DEVELOPPE POUR VERIFIER SIMULTANEMENT ET DE FACON NON-ITERATIVE L'INCOMPRESSIBILITE DE LA BULLE ET DE L'ECOULEMENT EXTERNE AINSI QUE LE BILAN INTERFACIAL DES CONTRAINTES NORMALES. TROIS SITUATIONS PHYSIQUES SONT ENSUITE CONSIDEREES EN DETAIL: L'ECOULEMENT AUTOUR D'UNE BULLE ELLIPSOIDALE DE FORME FIXE, LES OSCILLATIONS D'UNE BULLE EN L'ABSENCE DE GRAVITE ET LA MONTEE D'UNE BULLE DANS UN LIQUIDE AU REPOS. PLUSIEURS RESULTATS SIGNIFICATIFS SONT PRESENTES: - L'ANALYSE DU MECANISME DE GENERATION ET DE DISPARITION D'UN TOURBILLON ATTACHE DERRIERE UNE BULLE ELLIPSOIDALE DE FORME FIXE ET LA DETERMINATION PRECISE DE SON DOMAINE D'EXISTENCE - LA DETERMINATION DES EFFETS D'AMPLITUDE FINIE, DE VISCOSITE ET DE CONFINEMENT SUR LES OSCILLATIONS NON-LINEAIRES D'UNE BULLE - LA MISE EN EVIDENCE, DANS CERTAINS REGIMES DE MONTEE D'UNE BULLE, D'OSCILLATIONS COUPLEES ENTRE LA FORME DE L'INTERFACE ET L'ECOULEMENT EXTERNE, OSCILLATIONS QUI CONDUISENT A L'INSTABILITE DES TRAJECTOIRES RECTILIGNES
Download or read book Contribution l tude de l coulement entre deux cylindres coaxiaux written by Gérard Patotzki (auteur d'une thèse de sciences.) and published by . This book was released on 1977 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Etude de l coulement d un fluide visqueux incompressible autour d un obstacle cylindrique par une m thode d l ments finis written by Batman Khodayar and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Etude des actions exercées sur un obstacle cylindrique de section quelconque rigide et fixe par un écoulement fluide visqueux incompressible et initialement uniforme et stationnaire. Etude de la formation de tourbillons au voisinage du cylindre. Influence du nombre de Reynolds. Comparaison des résultats avec d'autres résultats de calcul et avec des résultats expérimentaux
Download or read book tude de l interaction entre un fluide et une structure oscillante r gimes d coulement et de forces du cylindre isol au r seau de cylindres written by Marion Duclercq and published by . This book was released on 2010 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: en français : Cette thèse porte sur l'étude numérique et physique de la dynamique d'un fluide réel incompressible initialement au repos, mis en mouvement par les oscillations rectilignes transversales forcées d'un cylindre. Ce système est décrit par deux nombres adimensionnels. Le nombre de Reynolds (Re) compare les forces d'inertie aux forces de viscosité, et le nombre de Keulegan-Carpenter (KC) mesure l'amplitude des oscillations du cylindre par rapport à son diamètre. L'objectif est de déterminer l'influence de ces deux paramètres sur les forces de traînée et de portance exercées par le fluide sur la structure, en lien avec la dynamique de l'écoulement. Les équations de Navier-Stokes sont résolues numériquement par une méthode d'éléments finis. Les résultats de ces calculs pour l'écoulement et les forces permettent d'abord d'identifier différents modes de comportement du système sur un cycle d'oscillation du cylindre. Les propriétés de symétrie de l'écoulement et les trajectoires des tourbillons sont corrélées aux signaux temporels des forces. Puis l'analyse de la réponse du système sur des temps longs devant la période d'oscillation du cylindre met en évidence des domaines de stabilité des modes dans le plan (KC, Re). Dans certains régimes, les forces présentent des fluctuations d'amplitude. Elles sont interprétées notamment à l'aide des spectres des forces et des instabilités observées dans l'écoulement. Enfin, le passage du problème d'un seul cylindre à un réseau carré de 25 cylindres est étudié. Une approche énergétique est proposée pour caractériser l'influence de KC et Re sur le comportement global du système, dans le cas du cylindre isolé et celui du réseau.
Download or read book tude de la r ponse en cisaillement instationnaire de certains fluides non newtoniens written by Michel Dognon (auteur d'une thèse de sciences.) and published by . This book was released on 1980 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contribution la mod lisation de l coulement de fluide visqueux autour de faisceaux de cylindres circulaires written by Stéphane Étienne and published by . This book was released on 1999 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A History of the Theory of Elasticity and of the Strength of Materials written by Isaac Todhunter and published by . This book was released on 1886 with total page 970 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Adhesion Between Polymers and Concrete Adh sion Entre Polym res Et B ton written by H. R. Sasse and published by Springer. This book was released on 1986 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preface Adhesion is a phenomenon architects and civil engineers are not very familiar with. In other disciplines knowledge about surface properties and the background of bonding energies is also far from satisfactory; nevertheless there are many important· applications in concrete engineering, where adhesion is necessary for success and durability. These include: - coating and painting - repair of concrete surfaces - bonding of fresh to old concrete - crack injection - glueing of precast elements - glueing of steel to concrete, etc. In 1981 RILEM established the technical committee 52-RAC 'Resin Adherence to Concrete'. The main aims of the committee's work were - to collect research results and practical experiences - to initiate and coordinate research programs - to develop, on a scientific base, test methods for field and for laboratory purposes. One of the results of the committee's work is a state-of-the-art report, which will be presented orally as a General Report at the International Symposium ISAP '86, and will be printed either in the RILEM journal Materials and Structures or separately. Several test recommendations have been elaborated and will be prepared as drafts for the participants ofISAP '86. These are: - direct tensile test - pull-off test - direct shear test - slant shear test - four-point bending test - dynamic loading test - thermal compatibility test (two versions) - injectibility test.
Download or read book Proceedings of the International Congress of Mathematicians written by S.D. Chatterji and published by Birkhäuser. This book was released on 2012-12-06 with total page 1669 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the first ICM was held in Zürich in 1897, it has become the pinnacle of mathematical gatherings. It aims at giving an overview of the current state of different branches of mathematics and its applications as well as an insight into the treatment of special problems of exceptional importance. The proceedings of the ICMs have provided a rich chronology of mathematical development in all its branches and a unique documentation of contemporary research. They form an indispensable part of every mathematical library. The Proceedings of the International Congress of Mathematicians 1994, held in Zürich from August 3rd to 11th, 1994, are published in two volumes. Volume I contains an account of the organization of the Congress, the list of ordinary members, the reports on the work of the Fields Medalists and the Nevanlinna Prize Winner, the plenary one-hour addresses, and the invited addresses presented at Section Meetings 1 - 6. Volume II contains the invited address for Section Meetings 7 - 19. A complete author index is included in both volumes. '...the content of these impressive two volumes sheds a certain light on the present state of mathematical sciences and anybody doing research in mathematics should look carefully at these Proceedings. For young people beginning research, this is even more important, so these are a must for any serious mathematics library. The graphical presentation is, as always with Birkhäuser, excellent....' (Revue Roumaine de Mathematiques pures et Appliquées)
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.
Download or read book Boundary Layer Separation written by Frank T. Smith and published by Springer. This book was released on 2011-12-28 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The IUTAM Symposium on Boundary-Layer Separation, suggested by the UK National Committee of Theoretical and Applied Mechanics and supported by the International Union of Theoretical and Applied Mechanics, was held at University College London on August 26-28, 1986. The proposed theme and scope of the Symposium were designed to help to bring about the necessary interaction between experimentalists, computationalists and theoreticians for the furthering of understanding in this challenging subject. The talks and discussions were aimed at representing the very wide range and application of separating-flow phenomena, which often substantially affect the whole of fluid dynamics at medium to large Reynolds numbers, covering in particular both laminar and turbulent flow, steady or unsteady, two- or three-dimensional, small or large-scale, incompressible or compressible, external or internal, from the experimental, computational and theoretical standpoints. It was intended that about 80 scientists would participate in the Symposium, with about 25 talks being delivered, to which poster sessions with 8 contributions were added subsequently. All the speakers and poster presenters were selected by the scientific committee, although two late replacements of speakers were required. Fruitful discussions, well led by the session chairmen, took place formally after each talk and after the poster sessions and informally on other occasions including the social events. The present proceedings of the Symposium appear to reflect much of the current state of experimental, computational and theoretical work and progress in boundary-layer separation. We hope that they provide also ideas, questions and stimulation, in addition to major recent developments.
Download or read book Flow Sensing in Air and Water written by Horst Bleckmann and published by Springer Science & Business Media. This book was released on 2014-01-22 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, leading scientists in the fields of sensory biology, neuroscience, physics and engineering explore the basic operational principles and behavioral uses of flow sensing in animals and how they might be applied to engineering applications such as autonomous control of underwater or aerial vehicles. Although humans possess no flow-sensing abilities, countless aquatic (e.g. fish, cephalopods and seals), terrestrial (e.g. crickets and spiders) and aerial (e.g. bats) animals have flow sensing abilities that underlie remarkable behavioral feats. These include the ability to follow silent hydrodynamic trails long after the trailblazer has left the scene, to form hydrodynamic images of their environment in total darkness, and to swim or fly efficiently and effortlessly in the face of destabilizing currents and winds.
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:
Download or read book Nonlinear Structural Dynamics and Damping written by Juan Carlos Jauregui and published by Springer. This book was released on 2019-03-14 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book compiles recent research in the field of nonlinear dynamics, vibrations and damping applied to engineering structures. It addresses the modeling of nonlinear vibrations in beams, frames and complex mechanical systems, as well as the modeling of damping systems and viscoelastic materials applied to structural dynamics. The book includes several chapters related to solution techniques and signal analysis techniques. Last but not least, it deals with the identification of nonlinear responses applied to condition monitoring systems.
Download or read book The Voice in Cinema written by Michel Chion and published by Columbia University Press. This book was released on 1999 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chion analyzes imaginative uses of the human voice by directors like Lang, Hitchcock, Ophuls, Duras, and de Palma.
Download or read book Extraterrestrial Seismology written by Vincent C. H. Tong and published by Cambridge University Press. This book was released on 2015-06-25 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Taking a transdisciplinary approach to seismology, this unique book reviews the most recent developments in planetary seismology, helioseismology, and asteroseismology.
