Download or read book PROPAGATION D ONDES ACOUSTIQUES DANS LES MELANGES DIPHASIQUES LIQUIDE VAPEUR written by CHRISTOPHE.. COSTE and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL PRESENTE UNE ETUDE EXPERIMENTALE DE LA PROPAGATION D'ONDES ACOUSTIQUES D'AMPLITUDE FAIBLE OU MODEREE DANS UN MELANGE DE BULLES D'ETHER DANS L'ETHER LIQUIDE, A FAIBLE FRACTION VOLUMIQUE DE VAPEUR. LE DISPOSITIF EXPERIMENTAL EST UN TUBE VERTICAL A ONDES STATIONNAIRES. NOUS MESURONS L'ATTENUATION SUBIE PAR UNE IMPULSION ACOUSTIQUE AINSI QUE SA VITESSE DE PROPAGATION; PAR AILLEURS NOUS ETUDIONS LE COMPORTEMENT EN ONDES STATIONNAIRES DU TUBE, PLUS PRECISEMENT L'EVOLUTION DES DEUX PREMIERES RESONANCES DU TUBE EN FONCTION DE LA FRACTION VOLUMIQUE DE VAPEUR. LE MODELE THEORIQUE LE PLUS SIMPLE CONSIDERE LE MELANGE COMME UN MILIEU EFFECTIF DONT LA DENSITE ET LA COMPRESSIBILITE SONT LES MOYENNES DE CELLES DU LIQUIDE ET DE LA VAPEUR: NOUS MONTRONS QU'IL N'EST PAS EN ACCORD AVEC L'EXPERIENCE. UN AUTRE MODELE POUR LE CALCUL DE LA COMPRESSIBILITE EFFECTIVE PREND EN COMPTE LES ECHANGES DE MATIERE ET DE CHALEUR ENTRE LES DEUX PHASES: NOUS APPORTONS DES PREUVES EXPERIMENTALES CONVAINCANTES DE LA VALIDITE DE CE MODELE. ENFIN NOUS METTONS EN EVIDENCE LE COMPORTEMENT NON-LINEAIRE A AMPLITUDE MODEREE DE NOTRE SYSTEME, ET NOUS EXPLIQUONS CE PHENOMENE PAR L'EFFET DE LA PRESSION DE RADIATION EXERCEE PAR L'ONDE ACOUSTIQUE SUR LES BULLES, QUI MODIFIE LA FRACTION VOLUMIQUE DE VAPEUR

Download or read book Quelques contributions aux traitements num riques de probl mes interface liquide vapeur written by Jean-Pierre Cocchi and published by . This book was released on 1997 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL PORTE SUR LA MODELISATION D'ECOULEMENTS BIDIMENSIONNELS INSTATIONNAIRES AUTOUR DE PROJECTILE SUPERSONIQUE DANS L'EAU. POUR CELA, ON S'INTERESSE AUX SUIVIS ET AUX CAPTURES D'INTERFACES LIQUIDE-GAZ EN COMPORTEMENT HYDRODYNAMIQUE, AINSI QU'AU PHENOMENE DE CAVITATION. PLUSIEURS MODELES DIPHASIQUES DE CES ECOULEMENTS SUPERCAVITANTS SONT ELABORES. ON TRAITE TOUT D'ABORD UNE INTERFACE SEPARANT DEUX MILIEUX COMPRESSIBLES REGIS PAR DEUX LOIS D'ETAT DIFFERENTES, SANS TRANSITION DE PHASES. ON PROPOSE UNE NOUVELLE METHODE DE TYPE FRONT TRACKING EN MONO ET BIDIMENSIONNEL, BASEE SUR LA RESOLUTION DU PROBLEME DE RIEMANN EXACT, QUI PERMET DE CORRIGER LES NUDS ALTERES PAR LA DIFFUSION NUMERIQUE. CE TYPE DE RESOLUTION EST APPLIQUE A PLUSIEURS CAS TESTS MONO ET BIDIMENSIONNELS, ET MONTRE LA PRECISION DES CALCULS. ON ADOPTE ENSUITE UNE FORMULATION DIPHASIQUE DU MILIEU QUI INCLUT LA TRANSITION DE PHASE LIQUIDE-VAPEUR (CAVITATION) ET QUI FAIT INTERVENIR UNE LOI D'ETAT VALABLE A LA FOIS POUR LE LIQUIDE, LA VAPEUR ET LE MELANGE DIPHASIQUE AUX HAUTES ET BASSES PRESSIONS. CE SYSTEME D'EQUATIONS EST RESOLU SOUS UNE FORMULATION MIXTE PARTICULIERE, A L'AIDE DU SCHEMA DE MAC CORMACK A L'ORDRE 2 ET PERMET UN TRAITEMENT TRES AISE D'ECOULEMENTS SUPERCAVITANTS.

Download or read book LASL Shock Hugoniot Data written by Stanley P. Marsh and published by Univ of California Press. This book was released on 1980-01-01 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acoustics Aeroacoustics and Vibrations written by Fabien Anselmet and published by John Wiley & Sons. This book was released on 2016-01-07 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: This didactic book presents the main elements of acoustics, aeroacoustics and vibrations. Illustrated with numerous concrete examples linked to solid and fluid continua, Acoustics, Aeroacoustics and Vibrations proposes a selection of applications encountered in the three fields, whether in room acoustics, transport, energy production systems or environmental problems. Theoretical approaches enable us to analyze the different processes in play. Typical results, mostly from numerical simulations, are used to illustrate the main phenomena (fluid acoustics, radiation, diffraction, vibroacoustics, etc.).

Download or read book Theoretical and Numerical Combustion written by Thierry Poinsot and published by R.T. Edwards, Inc.. This book was released on 2005 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introducing numerical techniques for combustion, this textbook describes both laminar and turbulent flames, addresses the problem of flame-wall interaction, and presents a series of theoretical tools used to study the coupling phenomena between combustion and acoustics. The second edition incorporates recent advances in unsteady simulation methods,

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 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 Reacting Flows Combustion and Chemical Reactors written by G. S. S. Ludford and published by American Mathematical Soc.. This book was released on 1986 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: Represents the culmination of the Special Year '84-'85 in Reacting Flows held at Cornell University. This work focuses on both mathematical and computational questions in combustion and chemical reactors. It is suitable for researchers and graduate students in the theory of reacting flows.