Download or read book ETUDE DU PLASMA AU VOISINAGE DES ELECTRODES D UN ARC ELECTRIQUE DANS L AZOTE written by ARILAZA.. RANDRIAMAHEFASOA and published by . This book was released on 1983 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE DE L'INFLUENCE DES VAPEURS DE CUIVRE EMISES PAR UNE ANODE SUR LES PARAMETRES D'UN PLASMA D'ARC DANS L'AZOTE. LES PROFILS DE LA TEMPERATURE AINSI QUE LES PROFILS DE DENSITE DU ONT ETE DETERMINES SPECTROSCOPIQUEMENT, PAR LA METHODE DES INTENSITES ABSOLUES DES RAIES. ON EN DEDUIT, EN SUPPOSANT L'ETL REALISE, LA DENSITE DES ESPECES EN PRESENCE DANS LE PLASMA. LES CONDUCTIVITES ELECTRIQUE ET THERMIQUE DU PLASMA ONT ETE CALCULEES POUR CETTE COMPOSITION DU PLASMA, PAR LA METHODE DE CHAPMAN-EUSKOG, AINSI QUE LE CHAMP ELECTRIQUE, LA TEMPERATURE ET LA CONDUCTANCE DE L'ARC AU VOISINAGE DES ELECTRODES, PAR L'EVALUATION DU BILAN D'ENERGIE. IL APPARAIT QUE LA PRESENCE DES VAPEURS DE CUIVRE MODIFIE DE MANIERE TRES SENSIBLE LES PARAMETRES DU PLASMA AU VOISINAGE DE L'ANODE

Download or read book ETUDE DE L INFLUENCE DES VAPEURS DE CUIVRE SUR LE PLASMA D UN ARC ELECTRIQUE AU VOISINAGE DES ELECTRODES written by HASSAN.. ABDELHAKIM IBRAHIM and published by . This book was released on 1982 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: APRES UN BREF RAPPEL DE THEORIE CINETIQUE DES GAZ, LES EXPRESSIONS NECESSAIRES AU CALCUL DES COEFFICIENTS DE TRANSPORT DANS UN PLASMA AZOTE-CUIVRE SONT ETABLIES. LES SECTIONS EFFICACES QUI N'ONT PU ETRE TROUVEES DANS LA LITTERATURE SONT CALCULEES. LE DEUXIEME CHAPITRE EST CONSACRE AU CALCUL DES INTEGRALES DE COLLISIONS QUI PERMETTENT DE DETERMINER LES VALEURS DES COEFFICIENTS DE TRANSPORT EN FONCTION DE LA TEMPERATURE POUR PLUSIEURS POURCENTAGES DE CUIVRE DANS L'AZOTE: COEFFICIENTS DE CONDUCTIVITE ELECTRIQUE ET THERMIQUE, DIFFUSION, VISCOSITE. LE CHAPITRE IV EST CONSACRE AUX RESULTATS EXPERIMENTAUX. LA TEMPERATURE ET LA REPARTITION DE CUIVRE DANS LA DECHARGE SONT AINSI DETERMINEES POUR PLUSIEURS CONDITIONS DE FONCTIONNEMENT. DANS LE CINQUIEME CHAPITRE, CES VALEURS SONT COMPAREES A CELLES OBTENUES PAR LE CALCUL EN UTILISANT UN MODELE MACROSCOPIQUE DE BILAN D'ENERGIE

Download or read book Etude exp rimentale des propri t s d un plasma d arc au voisinage de la cathode written by Pascal Gudzy and published by . This book was released on 1995 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'UTILISATION INDUSTRIELLE DES ARCS ELECTRIQUES EST SOUVENT LIMITEE PAR L'EROSION DES ELECTRODES ; EN PARTICULIER, DANS LA REGION CATHODIQUE D'UN ARC CARACTERISEE PAR DE FAIBLES DIMENSIONS (DE L'ORDRE DU MILLIMETRE) ET DE TRES GRANDES DENSITES DE COURANT. LA DETERMINATION DES TEMPERATURES ET DES DENSITES ELECTRONIQUES AU VOISINAGE DE LA CATHODE PRESENTE UN TRES GRAND INTERET POUR TESTER LA VALIDITE DES MODELES DANS UNE REGION PARTICULIEREMENT DIFFICILE A MODELISER. LES TRAVAUX DEVELOPPES DANS CETTE THESE PORTENT SUR LE DIAGNOSTIC DU PLASMA D'UN ARC TRANSFERE D'ARGON AU VOISINAGE DE LA CATHODE. CES ETUDES ONT PERMIS D'OBSERVER DES ANOMALIES QUI, JUSQU'A PRESENT N'ONT PAS RECU D'EXPLICATIONS SATISFAISANTES, COMME NOTAMMENT LA DIMINUTION DE L'EMISSIVITE DES RAIES D'ARGON NEUTRE LE LONG D'UNE ISOTHERME AU FUR ET A MESURE QUE L'ON SE RAPPROCHE DE LA POINTE DE LA CATHODE, OU BIEN L'UTILISATION DE DIFFERENTES METHODES POUR LA DETERMINATION DE LA DENSITE ELECTRONIQUE QUI PRESENTE UN ECART IMPORTANT PAR RAPPORT A LA VALEUR DONNEE A L'EQUILIBRE THERMODYNAMIQUE LOCAL. PLUSIEURS METHODES D'ANALYSE DU RAYONNEMENT ONT ETE EMPLOYEES EN REGIME STATIONNAIRE, AVEC NOTAMMENT L'UTILISATION DE PLUSIEURS INTENSITES DE COURANT. L'ETUDE DES MECANISMES A L'EXTINCTION NOUS A PERMIS D'EN DEDUIRE QUE, PARMI LES TROIS MECANISMES PRINCIPAUX QUI INFLUENCENT LES PROPRIETES DU PLASMA AU VOISINAGE DE LA CATHODE (ECART A L'EQUILIBRE THERMIQUE, DEPRESSION, ECART A L'EQUILIBRE STATISTIQUE), SEUL L'ECART A L'EQUILIBRE STATISTIQUE JOUE LE ROLE LE PLUS IMPORTANT, MAIS IL SEMBLE QUE LES DEUX AUTRES EFFETS SE MANIFESTENT ET PEUVENT CONTRIBUER EGALEMENT AUX PHENOMENES OBSERVES

Download or read book Contribution l tude d un plasma d arc lectrique au voisinage de la cathode written by Luc REYNAUD and published by . This book was released on 1982 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acta Physica Polonica written by and published by . This book was released on 1978 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt: Section A includes general physics, solid state physics, applied physics.

Download or read book Comptes rendus de la Conf rence internationale sur les ph nom nes d ionisation dans les gaz written by and published by . This book was released on 1963 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the International Conference on Phenomena in Ionized Gases written by and published by . This book was released on 1963 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings written by and published by . This book was released on 1963 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comptes rendus de la VIe Conf rence internationale sur les ph nom nes d ionisation dans les gaz sous le haut patronage de Monsieur le ministre d tat charg de la recherche scientifique et des questions atomiques et spatiales Paris 8 13 juillet 1963 written by and published by . This book was released on 1963 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Revue de physique appliqu e written by and published by . This book was released on 1984 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analytical Methods in the Nuclear Fuel Cycle written by and published by . This book was released on 1972 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modern Surface Organometallic Chemistry written by Jean-Marie Basset and published by John Wiley & Sons. This book was released on 2009-07-10 with total page 725 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering everything from the basics to recent applications, this monograph represents an advanced overview of the field. Edited by internationally acclaimed experts respected throughout the community, the book is clearly divided into sections on fundamental and applied surface organometallic chemistry. Backed by numerous examples from the recent literature, this is a key reference for all chemists.

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.

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.

Download or read book Metabolism and Function a Collection of Papers Dedicated to Otto Meyerhof on the Occasion of His 65th Birthday written by David 1899- Nachmansohn and published by Hassell Street Press. This book was released on 2021-09-09 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Download or read book Ball Lightning written by Mark Stenhoff and published by Springer Science & Business Media. This book was released on 2005-12-16 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Down comes a deluge of sonorous hail, Or prone-descending rain. Wide-rent, the clouds Pour a whole flood, and yet, its flame unquenched, Th’unconquerable lightning struggles through. Ragged and fierce, or in red whirling balls, And fires the mountains with redoubled rage. Black from the stroke, above, the smould’ring pine Stands a sad shattered trunk; and, stretched below, A lifeless group the blasted cattle lie. James Thompson, “The Seasons” (1727) have been investigating ball lightning for more than two decades. I published a ball lightning report in Nature in 1976 that received worldwide publicity and I consequently many people wrote to me with accounts of their own experiences. Within a very short time, I had accumulated about 200 firsthand accounts, and the file has continued to grow steadily since then. Several things impressed me. Few of those who wrote to me had any detailed foreknowledge of ball lightning at the time of their observation. Nonetheless, once reports of other phenomena such as St. Elmo’s fire had been eliminated, the remaining descriptions were remarkably consistent. Furthermore, nearly all who contacted me were keen to have an explanation of what they had seen and seemed entirely sincere.

Download or read book Diffusion in Materials DIMAT 2011 written by Igor Bezverkhyy and published by Trans Tech Publications Ltd. This book was released on 2012-04-12 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Conference on Diffusion in Materials (DIMAT) is the benchmark conference series for diffusion in solids. DIMAT 2011 was organized by the University of Bourgogne in association with CNRS, Dijon (France). The conference showcased new results concerning theoretical tools as well as applied research approaches. Diffusion processes affect all types of materials: nanomaterials, materials for energy, metallurgy, glasses and ceramics, but each requires its own numerical tools. Volume is indexed by Thomson Reuters CPCI-S (WoS). This volume comprises most of the contributions presented at DIMAT 2011: 4 plenary lectures delivered by famous high-level scientists plus 88 contributions in the form of keynote lectures, talks and posters.