Download or read book PROPRIETES STATISTIQUES DES PETITES STRUCTURES DANS LES ECOULEMENTS TURBULENTS written by MURIEL.. MARCHAND and published by . This book was released on 1994 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: UNE ETUDE EXPERIMENTALE DU CHAMP DE VITESSE ET DE TEMPERATURE (CONSIDEREE COMME UN SCALAIRE PASSIF) A ETE REALISEE DANS DIVERS ECOULEMENTS PLEINEMENT TURBULENTS (JET, TURBULENCE DE GRILLE, SOUFFLERIE S1 DE L'ONERA), POUR UNE LARGE GAMME DE NOMBRES DE REYNOLDS. EN CE QUI CONCERNE LA VITESSE, DES OUTILS STATISTIQUES TELS QUE LA REPRESENTATION SPECTRALE DE L'ENERGIE, LES DENSITES DE PROBABILITE GLOBALES ET CONDITIONNELLES, OU LES MOMENTS DES FONCTIONS DE STRUCTURE, ONT PERMIS DE METTRE EN EVIDENCE LE ROLE DETERMINANT DU TAUX DE TRANSFERT D'ENERGIE DANS L'INTERMITTENCE EN TURBULENCE TRIDIMENSIONNELLE. UNE NOUVELLE REPRESENTATION, LOG-SIMILAIRE, A ETE PROPOSEE, AFIN DE QUANTIFIER LE NIVEAU D'INTERMITTENCE D'UN ECOULEMENT TURBULENT. CETTE REPRESENTATION UNIVERSELLE C'EST-A-DIRE VALABLE QUEL QUE SOIT LE TYPE DE L'ECOULEMENT ET SON NOMBRE DE REYNOLDS QUI EST INCOMPATIBLE AVEC L'EXISTENCE DE LOIS D'ECHELLES ABSOLUES, EST EN BON ACCORD AVEC LES PREDICTIONS DE L'APPROCHE VARIATIONNELLE DE LA TURBULENCE. EN CE QUI CONCERNE LE CHAMP DE TEMPERATURE, LES DONNEES EXPERIMENTALES INDIQUENT CLAIREMENT QUE LES PROPRIETES STATISTIQUES DE CE SCALAIRE DIFFERENT DE CELLES DE LA VITESSE. EN PARTICULIER, LES DENSITES DE PROBABILITE GLOBALES ET CONDITIONNELLES MONTRENT QUE, D'UNE PART, LA DISTRIBUTION DE CE SCALAIRE EST QUASI-EXPONENTIELLE EN L'ABSENCE D'UN GRADIENT LONGITUDINAL DE TEMPERATURE ET D'AUTRE PART, L'INTERMITTENCE SE MANIFESTE DE FACON PLUS COMPLEXE QUE POUR LA VITESSE, FAISANT INTERVENIR LE TAUX DE TRANSFERT DE LA VARIANCE DE TEMPERATURE

Download or read book Some Observed Statistical Properties of Small Scale Turbulence written by John Ronald Wilson and published by Ottawa, Ont. : Marine Sciences Directorate, Department of Fisheries and the Environment. This book was released on 1977 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ORDRE ET DESORDRE DANS LES MODELES EN COUCHES DE LA TURBULENCE HYDRODYNAMIQUE written by ISABELLE.. DAUMONT and published by . This book was released on 1999 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE CADRE SIMPLIFIE DES MODELES EN COUCHES PERMET D'ETUDIER LE LIEN ENTRE LES PROPRIETES STATISTIQUES DES ECOULEMENTS TURBULENTS ET LA PRESENCE DE STRUCTURES QUI TRANSPORTENT L'ACTIVITE ENERGETIQUE DE MANIERE COHERENTE DES GRANDES VERS LES PETITES ECHELLES. L'IDEE DIRECTRICE EST QUE CES STRUCTURES CORRESPONDENT A DES FLUCTUATIONS PRIVILEGIEES DANS L'ESPACE CONFIGURATIONNEL. ON COMMENCE PAR RAPPELER LES PROPRIETES DE LA DYNAMIQUE DETERMINISTE DU MODELE GOY ET LES DONNEES STATISTIQUES REALISEES SUR L'ENREGISTREMENT DES PICS DU FLUX D'ENERGIE. PUIS EN PARAMETRISANT L'ACTION DES FLUCTUATIONS DES PETITES ECHELLES COMME UN BRUIT BLANC GAUSSIEN DE FAIBLE LARGEUR, NOUS MENONS A BIEN UNE ANALYSE SEMI-CLASSIQUE DE L'EQUATION STOCHASTIQUE AINSI OBTENUE, AU MOYEN D'UN ALGORITHME ORIGINAL. LES SOLUTIONS SINGULIERES ET AUTO-SIMILAIRES REPRODUISENT LA MULTIFRACTALITE DU PROBLEME DE DEPART, AINSI QUE LA FORME DE LA DISTRIBUTION DE PROBABILITE ASSOCIEE AUX OBJETS COHERENTS ET UN ACCORD QUANTITATIF EST ATTEINT POUR UN DOMAINE DE COUCHES PROCHES DE CELLE OU LA DISSIPATION EQUILIBRE LES EFFETS-NON LINEAIRES. NOUS APPROFONDISSONS NOTRE COMPREHENSION DES MECANISMES CONDUISANT A L'INTERMITTENCE EN MODELISANT LA HIERARCHIE DES PHENOMENES DE DUPLICATION DES PICS D'ACTIVITE EN DEGAGEANT UNE STRUCTURE EFFECTIVE D'ARBRE DANS L'ESPACE DES ECHELLES ET DES TEMPS, COMPATIBLE AVEC LES STATISTIQUES DU MODELE GOY. ENFIN NOUS GENERALISONS NOTRE PREMIERE APPROCHE AU PROBLEME DE L'ADVECTION D'UN SCALAIRE PASSIF PAR UN CHAMP DE VITESSE STOCHASTIQUE. PAR COMPARAISON AVEC LES SIMULATIONS NUMERIQUES DIRECTES, NOUS MONTRONS QUE LES STRUCTURES QUE NOUS AVONS IDENTIFIEES GOUVERNENT LE COMPORTEMENT EN LOIS D'ECHELLE DES MOMENTS D'ORDRE ELEVE DU SCALAIRE.

Download or read book Contribution l tude exp rimentale de l intermittence de la turbulence petite chelle written by Yves Gagne and published by . This book was released on 1980 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: REVUE DES DIFFERENTES THEORIES PROPOSEES DEPUIS 1962 ET PRENANT EN COMPTE LE PHENOMENE D'INTERMITTENCE A PETITE ECHELLE. ETUDE EXPERIMENTALE EN SOUFFLERIE DE TROIS ECOULEMENTS TURBULENTS: TURBULENCE DE GRILLE SOUMISE A UNE DEFORMATION PLANE, ECOULEMENT ENTRE DEUX PAROIS PARALLELES ET JETS AXISYMETRIQUES POUR DES NOMBRES DE REYNOLDS DE 50 A 500 (SUR L'ECHELLE DE TAYLOR). RESULTATS PARTANT SUR LES PROPRIETES STATISTIQUES DE LA VITESSE ET DE SA DERIVEE (MOMENTS, CORRELATIONS, FONCTIONS DE STRUCTURE, DENSITE DE PROBABILITE) ET SUR L'INTERMITTENCE DES PETITES STRUCTURES PROPREMENT DITES (COEFFICIENT D'INTERMITTENCE, HISTOGRAMME, APLATISSEMENT...)

Download or read book La Simulation des mod les de turbulence et leurs applications Second moment closure methodology and practice written by and published by . This book was released on 1984 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Turbulence bidimensionnelle written by René Moreau and published by . This book was released on 1983 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal de physique written by and published by . This book was released on 1976 with total page 1256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bifurcation and Nonlinear Eigenvalue Problems written by C. Bardos and published by Springer. This book was released on 2006-11-14 with total page 307 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Large Eddy Simulations of Turbulence written by M. Lesieur and published by Cambridge University Press. This book was released on 2005-08-22 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large-Eddy Simulations of Turbulence is a reference for LES, direct numerical simulation and Reynolds-averaged Navier-Stokes simulation.

Download or read book Asymptotic Modelling of Fluid Flows written by and published by . This book was released on 1986 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book From Order to Chaos written by Leo P. Kadanoff and published by World Scientific. This book was released on 1993 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: "World Scientific has made available a collection of Leo's reviews, essays columns and commentaries which is a feast in several senses: the strategy and tactics of science, the science itself, the history of several important developments in science, and as a bonus a beautifully illustrated collection of essays on computational science. The average reader may find this, the final section of the book, most interesting, but for me the account of his discovery of scaling, for which, inexplicably, he did not receive the Nobel prize, is most intriguing. Leo's combination of verve, frankness and insight makes this a very good read".P W AndersonPrinceton Univ".Publication of this volume will be very useful, especially for young readers. The papers disseminated over many journals acquire a new quality by being collected together. Readers not only can see a result in its final form, but also can trace its evolution".J Fluid Mechanics, 1994"The book is an invaluable source of information and inspiration ona variety of important problems in modern physics".EMS, 1999

Download or read book Turbulence written by Uriel Frisch and published by Cambridge University Press. This book was released on 1995-11-30 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook presents a modern account of turbulence, one of the greatest challenges in physics. The state-of-the-art is put into historical perspective five centuries after the first studies of Leonardo and half a century after the first attempt by A. N. Kolmogorov to predict the properties of flow at very high Reynolds numbers. Such 'fully developed turbulence' is ubiquitous in both cosmical and natural environments, in engineering applications and in everyday life. The intended readership for the book ranges from first-year graduate students in mathematics, physics, astrophysics, geosciences and engineering, to professional scientists and engineers. Elementary presentations of dynamical systems ideas, of probabilistic methods (including the theory of large deviations) and of fractal geometry make this a self-contained textbook.

Download or read book The Physics of Chaos and Related Problems written by Stig Lundqvist and published by . This book was released on 1984 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Manuscript Report Series written by and published by . This book was released on 1977 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book From Order To Chaos Ii Essays Critical Chaotic And Otherwise written by Leo P Kadanoff and published by World Scientific. This book was released on 1999-03-01 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a compilation of the review papers, expositions and some of the technical works of Leo Kadanoff, a theoretical physicist. The objective is to put together a group of not-too-technical writing in which he discusses some issues in condensed matter physics, hydrodynamics, applied mathematics and national policy.This expanded edition is divided into five sections. The first section contains review papers on hydrodynamics, condensed matter physics and field theory. Next is a selection of papers on scaling and universality, particularly as applied to phase changes. A change of pace is provided by a series of papers on the critical analysis of simulation models of urban economic and social development. The book concludes with a series of recent papers on complex patterns. Each major section has an introduction designed to tie the work together and to provide perspective on the subject matter.

Download or read book Manuscript Report Series Marine Sciences Directorate written by and published by . This book was released on 1976 with total page 880 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.).