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Book Cisaillement d une interface gaz liquide en conduite et entra  nement de gouttelettes

Download or read book Cisaillement d une interface gaz liquide en conduite et entra nement de gouttelettes written by Sylvain Boulesteix and published by . This book was released on 2010 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lorsqu'une couche de liquide est cisaillée par un écoulement de gaz plus rapide, des vagues de forte amplitude peuvent alors se former à l'interface et se déplacer à la surface du liquide. Si la vitesse du gaz est suffisante, on peut alors observer que de très nombreuses gouttelettes sont arrachées du sommet de ces vagues. Cette configuration se rencontre notamment dans l'industrie pétrolière, où elle est à l'origine d'une augmentation des pertes de charge dans les pipelines. Un dispositif expérimental a donc été conçu pour l'étude de ces phénomènes, dans le cas d'un écoulement eau-air dans une conduite horizontale de 5cm de diamètre. Des observations à l'aide d'une caméra rapide (6000 images/seconde) nous ont alors permis d'identifier les différents modes par lesquels les gouttes sont entraînées, et de les comparer à la littérature. Le développement de procédures complexes de traitement d'images numériques pour la détection et le suivi des gouttes nous ont également permis de mesurer les tailles, vitesses (axiales et verticales), concentrations et flux massiques des gouttes entraînées pour différentes conditions expérimentales. Une étude statistique de ces différentes quantités a ensuite été menée afin d'étudier le comportement des gouttes, notamment la manière dont elles sont transportées par le gaz environnant. Un modèle permettant de déduire la distribution des tailles de gouttes à partir de celle de leurs vitesses axiales a ainsi pu être proposé. Enfin, grâce à ces mesures, il a été montré que la perte de charge pouvait être obtenue à partir des équations-bilan de masse et de quantité de mouvement des deux phases. Diverses relations ont également été proposées, permettant de très bien prédire le gradient de pression dans notre dispositif expérimental. Bien que celles-ci soient essentiellement semi-empiriques, elles constituent un premier pas vers une modélisation plus phénoménologique du phénomène.

Book In Vessel Melt Retention and Ex Vessel Corium Cooling  IAEA Tecdoc No  1906

Download or read book In Vessel Melt Retention and Ex Vessel Corium Cooling IAEA Tecdoc No 1906 written by International Atomic Energy Agency and published by International Atomic Energy Agency. This book was released on 2020-08-06 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Book Satellite Situation Report

Download or read book Satellite Situation Report written by Goddard Space Flight Center. Office of Public Affairs and published by . This book was released on 1977 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Space Debris

    Book Details:
  • Author : Heiner Klinkrad
  • Publisher : Springer Science & Business Media
  • Release : 2006-09-01
  • ISBN : 3540376747
  • Pages : 438 pages

Download or read book Space Debris written by Heiner Klinkrad and published by Springer Science & Business Media. This book was released on 2006-09-01 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: The future evolution of the debris environment will be forecast on the basis of traffic models and possible hazard mitigation practices. The text shows how large trackable objects will have re-entry pinpointed and predictions made on related risk assessment for possible ground impact. Models will also be described for meteoroids which are also a prevailing risk.

Book Clinical Chronopharmacology

Download or read book Clinical Chronopharmacology written by Alain Reinberg and published by CRC Press. This book was released on 1990-07 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Periodical and predictable changes in biological susceptibility and response to a large variety of chemical agents, including drugs and food, have been documented since the early 1970s. This book provides a survey of clinically-documented research in chronopharmacology.

Book An Introduction to Differential Manifolds

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.

Book Minimum competence in scientific English

Download or read book Minimum competence in scientific English written by Sue Blattes and published by L'Editeur : EDP Sciences. This book was released on 2003 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cet ouvrage, devenu célèbre sous son sigle MCSE, a déjà été utilisé par plus de 50 000 étudiants, chercheurs, professionnels. L'objectif est de lire et écrire des textes en anglais scientifique avec facilité et pertinence. L'ouvrage est conçu pour que l'apprenant devienne un véritable utilisateur de l'anglais. La méthode originale repose sur l'analyse des fonctions et structures nécessaires : measurement, frequency, comparison, modification, link words, time, cause and consequence, hypothesis, modality, purpose and process, impersonal forms, compound nouns and adjectives. Dans chaque unit, des tests d'auto-évaluation permettent de se situer et de construire son parcours de formation, d'abord en définissant ses objectifs à l'aide des key points et du lexis, puis, de façon plus personnalisée, en puisant dans les examples in context, checkpoints (back to basics, word web), web search, FAQs... MCSE est l'outil de base d'une méthode qui comprend aussi d'autres outils dans la même collection (Listening Comprehension for Scientiflc English et Speaking Skills in Scientitic English). L'ouvrage est destiné à tout apprenant de niveau baccalauréat qui désire acquérir une réelle compétence dans l'écriture et la lecture de textes en anglais scientifique.

Book Biological Rhythm Research

Download or read book Biological Rhythm Research written by A. Sollberger and published by . This book was released on 1965 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Endocrine Rhythms

    Book Details:
  • Author : Dorothy T. Krieger
  • Publisher :
  • Release : 1979
  • ISBN :
  • Pages : 352 pages

Download or read book Endocrine Rhythms written by Dorothy T. Krieger and published by . This book was released on 1979 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Textbook on Endocrinology

Download or read book Textbook on Endocrinology written by and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Handbook of physiology

Download or read book Handbook of physiology written by William Ferguson Hamilton and published by . This book was released on 1963 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Water Treatment Handbook

Download or read book Water Treatment Handbook written by and published by . This book was released on 2007 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt: