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Etude Experimentale Et Modelisation De La Collision De Gouttelettes
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Book Synopsis Étude expérimentale et modélisation de la collision de gouttelettes by : Jean-Philippe Estrade
Download or read book Étude expérimentale et modélisation de la collision de gouttelettes written by Jean-Philippe Estrade and published by . This book was released on 1998 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: La réduction de la quantité de polluants émis dans les gaz d'échappement des systèmes propulsifs est étroitement liée à l'amélioration de la conception des moteurs. Le carburant liquide est généralement introduit dans la chambre de combustion sous forme d'un brouillard de gouttelettes. Ces dernières subissent de nombreux phénomènes physiques tels que l'évaporation, l'impact sur les parois, la pulvérisation secondaire ou la collision. Les techniques optiques de mesure de la granulométrie sont difficilement applicable aux jets denses. Pour les étudier, la simulation numérique demeure l'unique solution. Une modélisation de tous les phénomènes physiques élémentaires est alors nécessaire. Pour atteindre ce but, des expériences de base sont réalisées afin d'étudier séparément chacun des processus physiques. Dans ce contexte, un dispositif expériemntal a été conçu pour établir une base de données sur la collision de deux gouttes. Il est équipé de deux injecteurs à orifice vibrant qui produisent des jets de gouttes calibrées et régulièrement espacées (jets monodisperses). Les collisions sont visualisées par ombroscopie. Un logiciel de traitement d'images développé pour cette étude est associé au banc de mesures afin de déterminer les tailles de gouttes, leur vitesse et à leur nombre après collision. Suivant les conditions initiales avant impact, fifférents régimes de collision apparaissent comme la coalescence, le rebond, la séparation par réflexion et la séparation par étirement ou rotation. A partir de mesures expérimentales, chaque régime de collision est caractérisé par le nombre de Weber, le parmaètre d'impact, le rapport des diamètres de gouttes et le nombre d'Ohnsesorge. Des modèles de comportement des gouttes après impact sont élaborés. Ils sont implantés dans des codes de simulation de jets denses de gouttes et les premiers résultats numériques sont exposés.
Book Synopsis Modélisation et calcul numérique des collisions de gouttes en écoulements laminaires et turbulents by : Franck Pigeonneau
Download or read book Modélisation et calcul numérique des collisions de gouttes en écoulements laminaires et turbulents written by Franck Pigeonneau and published by . This book was released on 1998 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE MEMOIRE A POUR OBJET LE CALCUL DES COLLISIONS DE GOUTTES DANS DIVERS ECOULEMENTS LAMINAIRES ET TURBULENTS. DANS LE CADRE DE L'APPROXIMATION DES EQUATIONS DE STOKES, LES FORCES D'INTERACTIONS HYDRODYNAMIQUES ENTRE DEUX GOUTTES SONT DETERMINEES DE FACON EXACTE AU MOYEN D'UN SYSTEME DE COORDONNEES BISPHERIQUES. CES FORCES PERMETTENT DE CALCULER LES TAUX DE COLLISION POUR DES ECOULEMENTS DE CISAILLEMENT SIMPLE ET D'ELONGATION PURE. LES SECTIONS DE COLLISION SONT OBTENUES PAR TRAJECTOGRAPHIE. LES RESULTATS MONTRENT UN ACCROISSEMENT DE L'EFFICACITE DE COLLISION LORSQUE L'INERTIE DES GOUTTES CROIT. L'EXPRESSION DU TAUX DE COLLISION EN ECOULEMENT TURBULENT EST ANALOGUE A CELLE UTILISEE EN THEORIE CINETIQUE DES GAZ. LA FONCTION DE DISTRIBUTION DE PAIRES DE PARTICULES EST OBTENUE DANS LE CADRE D'UNE TURBULENCE HOMOGENE ET ISOTROPE ET A L'AIDE DE NOTIONS DE PROBABILITES CONDITIONNELLES. LES TAUX DE COLLISION SONT CALCULES SANS ET AVEC LES FORCES DE GRAVITE. L'EVOLUTION GRANULOMETRIQUE D'UN NUAGE DE GOUTTES EST DECRITE A L'AIDE D'UNE EQUATION CINETIQUE DE TYPE SMOLUCHOWSKI. CETTE EQUATION EST RESOLUE AU MOYEN D'UNE METHODE NUMERIQUE ORIGINALE. DEUX CAS SONT TRAITES. POUR DE PETITES GOUTTES EN ECOULEMENT TURBULENT HOMOGENE ET ISOTROPE, L'ELARGISSEMENT DU SPECTRE DE GOUTTES DEMANDE PLUS DE TEMPS SI LES INTERACTIONS HYDRODYNAMIQUES SONT PRISES EN COMPTE. POUR DE GROSSES GOUTTES, COMPTE TENU DE LA GRAVITE, LA FORMATION PAR COLLISIONS DE GOUTTES DE DIAMETRE SUPERIEUR A 200 MICROMETRES DEPEND FORTEMENT DE LA TURBULENCE. LES RESULTATS CORROBORENT LES RELEVES IN SITU DANS DES NUAGES DE TYPE STRATUS.
Author :Vigor Yang Publisher :AIAA (American Institute of Aeronautics & Astronautics) ISBN 13 : Total Pages :1044 pages Book Rating :4.3/5 (91 download)
Book Synopsis Solid Propellant Chemistry, Combustion, and Motor Interior Ballistics by : Vigor Yang
Download or read book Solid Propellant Chemistry, Combustion, and Motor Interior Ballistics written by Vigor Yang and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 2000 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume brings together the world's most highly regarded scientists in the field of solid rocket propulsion. Thirty-nine papers present in-depth coverage on a wide range of topics including: advanced materials and nontraditional formulations; the chemical aspects of organic and inorganic components in relation to decomposition mechanisms, kinetics, combustion, and modeling; safety issues, hazards and explosive characteristics; and experimental and computational interior ballistics research, including chemical information and the physics of the complex flowfield.
Book Synopsis Source Term Evaluation for Accident Conditions by : International Atomic Energy Agency
Download or read book Source Term Evaluation for Accident Conditions written by International Atomic Energy Agency and published by . This book was released on 1986 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a symposium organized in co-operation with the United States Nuclear Regulatory Commission and Battelle Columbus Laboratories, Columbus, Ohio, from 28 October to 1 November 1985. Five topics related to source term evaluation were selected for review and discussion, namely in-vessel release, retention in the primary circuit, ex-vessel release, retention in the containment and release from the plant.
Book Synopsis Basic Concepts for Simple and Complex Liquids by : Jean-Louis Barrat
Download or read book Basic Concepts for Simple and Complex Liquids written by Jean-Louis Barrat and published by Cambridge University Press. This book was released on 2003-03-27 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting a unified approach, this book focusses on the concepts and theoretical methods that are necessary for an understanding of the physics and chemistry of the fluid state. The authors do not attempt to cover the whole field in an encyclopedic manner. Instead, important ideas are presented in a concise and rigorous style, and illustrated with examples from both simple molecular liquids and more complex soft condensed matter systems such as polymers, colloids, and liquid crystals.
Book Synopsis On the Continuity of the Gaseous and Liquid States by : J. D. Van Der Waals
Download or read book On the Continuity of the Gaseous and Liquid States written by J. D. Van Der Waals and published by Courier Corporation. This book was released on 2004-01-01 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This much-cited thesis by J. D. van der Waals, the recipient of the 1910 Nobel Prize in physics, is accompanied by an introductory essay by J. S. Rowlinson and another work by van der Waals on the theory of liquid mixtures. 1988 edition.
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.
Book Synopsis Satellite Situation Report by : Goddard Space Flight Center. Office of Public Affairs
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 Synopsis Software for Exascale Computing - SPPEXA 2016-2019 by : Hans-Joachim Bungartz
Download or read book Software for Exascale Computing - SPPEXA 2016-2019 written by Hans-Joachim Bungartz and published by Springer Nature. This book was released on 2020-07-30 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book summarizes the research done and results obtained in the second funding phase of the Priority Program 1648 "Software for Exascale Computing" (SPPEXA) of the German Research Foundation (DFG) presented at the SPPEXA Symposium in Dresden during October 21-23, 2019. In that respect, it both represents a continuation of Vol. 113 in Springer’s series Lecture Notes in Computational Science and Engineering, the corresponding report of SPPEXA’s first funding phase, and provides an overview of SPPEXA’s contributions towards exascale computing in today's sumpercomputer technology. The individual chapters address one or more of the research directions (1) computational algorithms, (2) system software, (3) application software, (4) data management and exploration, (5) programming, and (6) software tools. The book has an interdisciplinary appeal: scholars from computational sub-fields in computer science, mathematics, physics, or engineering will find it of particular interest.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1992 with total page 1730 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Applications of Carbon Nanotubes by : Ajay Kumar Mishra
Download or read book Applications of Carbon Nanotubes written by Ajay Kumar Mishra and published by Nova Science Publishers. This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The discovery of carbon nanotubes has opened new windows for numerous applications in many disciplines of nanoscience and nanotechnology. Carbon nanotubes consist of graphene sheets in the form of sp2 hybridized carbon atoms. These materials have gained the interest of researchers from various disciplines due to their fascinating physico-chemical properties. This book describes the applications of carbon nanotubes in various areas including environmental science such as remediation and speciation, water research, medicine including sensors, targeted drug delivery and therapeutics. The application of carbon nanotubes in waste water research which includes organic, inorganic and microbial pollutants is also discussed as is its applications in material science and polymer science.
Book Synopsis Four Decades of Scientific Explanation by : Wesley C. Salmon
Download or read book Four Decades of Scientific Explanation written by Wesley C. Salmon and published by University of Pittsburgh Press. This book was released on 2006-06-28 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: As Aristotle stated, scientific explanation is based on deductive argument--yet, Wesley C. Salmon points out, not all deductive arguments are qualified explanations. The validity of the explanation must itself be examined. Four Decades of Scientific Explanation provides a comprehensive account of the developments in scientific explanation that transpired in the last four decades of the twentieth century. It continues to stand as the most comprehensive treatment of the writings on the subject during these years. Building on the historic 1948 essay by Carl G. Hempel and Paul Oppenheim, "Studies in the Logic of Explanation,” which introduced the deductive-nomological (D-N) model on which most work on scientific explanation was based for the following four decades, Salmon goes beyond this model's inherent basis of describing empirical knowledge to tells us “not only what, but also why.” Salmon examines the predominant models in chronological order and describes their development, refinement, and criticism or rejection. Four Decades of Scientific Explanation underscores the need for a consensus of approach and ongoing evaluations of methodology in scientific explanation, with the goal of providing a better understanding of natural phenomena.
Book Synopsis Principles of Mass Spectrometry Applied to Biomolecules by : Chava Lifshitz
Download or read book Principles of Mass Spectrometry Applied to Biomolecules written by Chava Lifshitz and published by John Wiley & Sons. This book was released on 2006-10-27 with total page 707 pages. Available in PDF, EPUB and Kindle. Book excerpt: An extensive compilation of articles by leading professionals, this reference explains the fundamental principles of mass spectrometry as they relate to the life sciences. Topics covered include spectroscopy, energetics and mechanisms of peptide fragmentation, electron capture dissociation, ion-ion and ion-molecule reactions, reaction dynamics, collisional activation, soft-landing, protein structure and interactions, thermochemistry, and more. The book empowers readers to develop new ways of using these techniques.
Book Synopsis Theory and Design for Mechanical Measurements by : Richard S. Figliola
Download or read book Theory and Design for Mechanical Measurements written by Richard S. Figliola and published by John Wiley & Sons. This book was released on 2020-06-23 with total page 599 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theory and Design for Mechanical Measurements merges time-tested pedagogy with current technology to deliver an immersive, accessible resource for both students and practicing engineers. Emphasizing statistics and uncertainty analysis with topical integration throughout, this book establishes a strong foundation in measurement theory while leveraging the e-book format to increase student engagement with interactive problems, electronic data sets, and more. This new Seventh edition has been updated with new practice problems, electronically accessible solutions, and dedicated Instructor Problems that ease course planning and assessment. Extensive coverage of device selection, test procedures, measurement system performance, and result reporting and analysis sets the field for generalized understanding, while practical discussion of data acquisition hardware, infrared imaging, and other current technologies demonstrate real-world methods and techniques. Designed to align with a variety of undergraduate course structures, this unique text offers a highly flexible pedagogical framework while remaining rigorous enough for use in graduate studies, independent study, or professional reference.
Book Synopsis Mathematical Modeling and Computational Tools by : Somnath Bhattacharyya
Download or read book Mathematical Modeling and Computational Tools written by Somnath Bhattacharyya and published by Springer. This book was released on 2020-06-14 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book features original research papers presented at the International Conference on Computational and Applied Mathematics, held at the Indian Institute of Technology Kharagpur, India during November 23–25, 2018. This book covers various topics under applied mathematics, ranging from modeling of fluid flow, numerical techniques to physical problems, electrokinetic transport phenomenon, graph theory and optimization, stochastic modelling and machine learning. It introduces the mathematical modeling of complicated scientific problems, discusses micro- and nanoscale transport phenomena, recent development in sophisticated numerical algorithms with applications, and gives an in-depth analysis of complicated real-world problems. With contributions from internationally acclaimed academic researchers and experienced practitioners and covering interdisciplinary applications, this book is a valuable resource for researchers and students in fields of mathematics, statistics, engineering, and health care.
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 Synopsis Rarefied Gas Dynamics by : K Karamcheti
Download or read book Rarefied Gas Dynamics written by K Karamcheti and published by Elsevier. This book was released on 2012-12-02 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rarefied Gas Dynamics is a collection of selected papers presented at the Eighth International Symposium on Rarefied Gas Dynamics, held at Stanford University in July 1972. The book is a record of the significant advances in the broad field of Rarefied Gas Dynamics that are considered to be of general and continuing interest. The articles in this compendium are organized under 10 main topics. The text presents research papers on the kinetic theory of gases; studies and experiments on shock structures of gases; use of kinetic theory for the solution of problems in evaporation and condensation; gas expansions and jets; and techniques and methods applied to the study of rarefied gas dynamics. The book also includes works on gas-solid interactions; descriptions of basic notions of current polyatomic gas kinetics; and observation of the gas dynamic phenomena in space. Physicists, aeronautical engineers, mechanical engineers, researchers, and students in the field of aircraft design will find this book a good source of knowledge and information.
