Download or read book Mod lisation et caract risation de d charges radiofr quence couplage capacitif dans l hydrog ne written by Luís Silvino Alves Marques and published by . This book was released on 2005 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE TRAVAIL PRESENTE TRAITE DE LA MODELISATION ET DE LA CARACTERISATION DE DECHARGES RADIOFREQUENCE (RF DANS L'HYDROGENE. LE REACTEUR UTILISE POSSEDE UNE SYMETRIE CYLINDRIQUE ET SES DEUX ELECTRODES, PARALLELES, PERMETTENT UN COUPLAGE CAPACITIF AU PLASMA. DANS UN PREMIER TEMPS, UN MODELE BI-DIMENSIONNEL ELABORE (QUI DECRIT LA DYNAMIQUE DES ELECTRONS ET DES IONS H+, H2+, H3+ ET H- DANS LE REACTEUR) Y EST COUPLE DE FAÇON AUTO-COHERENTE A UN MODELE COLLISIONNEL-RADIATIF HOMOGENE (QUI INCLUT UNE DESCRIPTION COMPLETE DE LA CINETIQUE VIBRATIONNELLE ET ATOMIQUE DE L'HYDROGENE). L'ETUDE DE LA DECHARGE Y EST MENEE SUR UNE GAMME ETENDUE DE FREQUENCES D'EXCITATION, DE PRESSIONS DU GAZ ET DE TENSIONS RF APPLIQUEES. UN BON ACCORD EST OBSERVE ENTRE LES PREVISIONS DU MODELE ET LES MESURES EXPERIMENTALES DU POTENTIEL PLASMA ET DE LA PUISSANCE ELECTRIQUE COUPLEE AU PLASMA. EN CE QUI CONCERNE LES VALEURS DE DENSITE ELECTRONIQUE ET DE TENSION D'AUTO-POLARISATION, L'ACCORD N'EST QUE QUALITATIF - LES VALEURS CALCULEES PAR LE MODELE ETANT SOUS-ESTIMEES PAR RAPPORT AUX RESULTATS EXPERIMENTAUX. CET ECART NE PEUT CEPENDANT PAS S'EXPLIQUER COMPLETEMENT PAR LE CHOIX DU SCHEMA CINETIQUE MAIS PLUS VRAISEMBLABLEMENT PAR CELUI DE LA DESCRIPTION HOMOGENE ADOPTEE POUR LE TRANSPORT DES NEUTRES. DANS UN DEUXIEME TEMPS, AFIN DE CLARIFIER CET ASPECT, UN MODELE HYDRODYNAMIQUE, EXPLOITANT LES EQUATIONS DE NAVIER STOKES, Y EST DEVELOPPE POUR LE GAZ ET COUPLE A UN MODULE DE TRANSPORT REACTIF DE MASSE MULTI-COMPOSANTS. CE MODELE INNOVATEUR DEVANT POUVOIR ETRE UTILISE.
Download or read book Low Temperature Plasma Technology written by Paul K. Chu and published by CRC Press. This book was released on 2013-07-15 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by a team of pioneering scientists from around the world, Low Temperature Plasma Technology: Methods and Applications brings together recent technological advances and research in the rapidly growing field of low temperature plasmas. The book provides a comprehensive overview of related phenomena such as plasma bullets, plasma penetration into biofilms, discharge-mode transition of atmospheric pressure plasmas, and self-organization of microdischarges. It describes relevant technology and diagnostics, including nanosecond pulsed discharge, cavity ringdown spectroscopy, and laser-induced fluorescence measurement, and explores the increasing research on atmospheric pressure nonequilibrium plasma jets. The authors also discuss how low temperature plasmas are used in the synthesis of nanomaterials, environmental applications, the treatment of biomaterials, and plasma medicine. This book provides a balanced and thorough treatment of the core principles, novel technology and diagnostics, and state-of-the-art applications of low temperature plasmas. It is accessible to scientists and graduate students in low-pressure plasma physics, nanotechnology, plasma medicine, and materials science. The book is also suitable as an advanced reference for senior undergraduate students.
Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Download or read book Chemically Reacting Flow written by Robert J. Kee and published by John Wiley & Sons. This book was released on 2005-02-18 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt: Complex chemically reacting flow simulations are commonly employed to develop quantitative understanding and to optimize reaction conditions in systems such as combustion, catalysis, chemical vapor deposition, and other chemical processes. Although reaction conditions, geometries, and fluid flow can vary widely among the applications of chemically reacting flows, all applications share a need for accurate, detailed descriptions of the chemical kinetics occurring in the gas-phase or on reactive surfaces. Chemically Reacting Flow: Theory and Practice combines fundamental concepts in fluid mechanics and physical chemistry, assisting the student and practicing researcher in developing analytical and simulation skills that are useful and extendable for solving real-world engineering problems. The first several chapters introduce transport processes, primarily from a fluid-mechanics point of view, incorporating computational simulation from the outset. The middle section targets physical chemistry topics that are required to develop chemically reacting flow simulations, such as chemical thermodynamics, molecular transport, chemical rate theories, and reaction mechanisms. The final chapters deal with complex chemically reacting flow simulations, emphasizing combustion and materials processing. Among other features, Chemically Reacting Flow: Theory and Practice: -Advances a comprehensive approach to interweaving the fundamentals of chemical kinetics and fluid mechanics -Embraces computational simulation, equipping the reader with effective, practical tools for solving real-world problems -Emphasizes physical fundamentals, enabling the analyst to understand how reacting flow simulations achieve their results -Provides a valuable resource for scientists and engineers who use Chemkin or similar software Computer simulation of reactive systems is highly effective in the development, enhancement, and optimization of chemical processes. Chemically Reacting Flow helps prepare both students and professionals to take practical advantage of this powerful capability.
Download or read book Computational Plasma Physics written by Toshi Tajima and published by CRC Press. This book was released on 2018-03-14 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physics of plasmas is an extremely rich and complex subject as the variety of topics addressed in this book demonstrates. This richness and complexity demands new and powerful techniques for investigating plasma physics. An outgrowth from his graduate course teaching, now with corrections, Tajima's text provides not only a lucid introduction to computational plasma physics, but also offers the reader many examples of the way numerical modeling, properly handled, can provide valuable physical understanding of the nonlinear aspects so often encountered in both laboratory and astrophysical plasmas. Included here are computational methods for modern nonlinear physics as applied to hydrodynamic turbulence, solitons, fast reconnection of magnetic fields, anomalous transports, dynamics of the sun, and more. The text contains examples of problems now solved using computational techniques including those concerning finite-size particles, spectral techniques, implicit differencing, gyrokinetic approaches, and particle simulation.
Download or read book Multicomponent Flow Modeling written by Vincent Giovangigli and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this is book to give a detailed presentation of multicomponent flow models and to investigate the mathematical structure and properties of the resulting system of partial differential equations. These developments are also illustrated by simulating numerically a typical laminar flame. Our aim in the chapters is to treat the general situation of multicomponent flows, taking into account complex chemistry and detailed transport phe nomena. In this book, we have adopted an interdisciplinary approach that en compasses a physical, mathematical, and numerical point of view. In par ticular, the links between molecular models, macroscopic models, mathe matical structure, and mathematical properties are emphasized. We also often mention flame models since combustion is an excellent prototype of multicomponent flow. This book still does not pretend to be a complete survey of existing models and related mathematical results. In particular, many subjects like multi phase-flows , turbulence modeling, specific applications, porous me dia, biological models, or magneto-hydrodynamics are not covered. We rather emphasize the fundamental modeling of multicomponent gaseous flows and the qualitative properties of the resulting systems of partial dif ferential equations. Part of this book was taught at the post-graduate level at the Uni versity of Paris, the University of Versailles, and at Ecole Poly technique in 1998-1999 to students of applied mathematics.
Download or read book Advances in Low Temperature Rf Plasmas written by Toshiaki Makabe and published by Elsevier Publishing Company. This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low temperature plasmas have had a very broad range of applications ever since their discovery. However, recent developments in the dextrous handling of dry etching non-equilibrium plasma have attracted a great common interest that has driving force behind the major developments in diagnostic, theoretical and numerical techniques since the 1980s. A greater fundamental understanding of the kinetics of radio-frequency (rf) plasmas and their interaction with surfaces in regard to the process of large scale integrated circuits has been achieved through the cooperation between academia and industry. At the same time, new applications have become possible, and the basic understanding of low temperature rf plasmas has diffused to other areas of plasma physics. in the special issue of Applied Surface Science, which is published in memory of the International Workshop on Basis for Low Temperature Plasma Applications at Hakone in Japan on July 24 - 25 of 2001. The basic goal in the selection of topics was to cover the range of issues that represent the building blocks of the complex, vertically integrated plasma simulation schemes including surface processes. The text also shows examples of integrated codes and how they are implemented in the development of new strategies of plasma processing. Such codes may be used both in modern experiments and in the computer aided design and control of the plasma devices of the next generation. These are based on the transport theory of electrons, ions and neutrals, as well as on numerical modellings and on the available collision and transport data describing gas and surface phases. density plasmas. All the chapters present a relatively complete review of the developments in these fields since the 1980s as well as a review of their status of development in 2002, and there is a blend of research reviews from both academia and industry.
Download or read book Scientific Canadian Mechanics Magazine and Patent Office Record written by Canada. Patent Office and published by . This book was released on 1966-03 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solar Cells and Light Management written by Francesco Enrichi and published by Elsevier. This book was released on 2019-10-26 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solar Cells and Light Management: Materials, Strategies and Sustainability provides an extensive review on the latest advances in PV materials, along with light management strategies for better exploiting the solar spectrum. Following a brief review of the current status of solar cells, the book discusses different concepts, principles and technologies for solar devices, starting with standard silicon cells and then covering organic-hybrid, DSSC, perovskite, quantum dots and nanostructured oxide solar cells. Other sections focus on light manipulation and spectral modification, materials for spectral conversion, and environmental and sustainably considerations. An emergy analysis, which is an extension of the Life Cycle Assessment methodology, is applied to the study of solar PV systems, thus allowing for effective integrated indicators.
Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.
