Download or read book ETUDE EXPERIMENTALE DE LA DIFFUSION DE LA CHALEUR EN AVAL D UNE SOURCE LINEAIRE PLACEE DANS UNE ALLEE DE BENARD VON KARMAN written by FRANCK.. WEISS and published by . This book was released on 1999 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL EXPERIMENTAL CONCERNE L'ETUDE DE LA DIFFUSION DE LA CHALEUR EN AVAL D'UNE SOURCE LINEAIRE CONTINUE PLACEE DANS LE PROCHE SILLAGE D'UN CYLINDRE CIRCULAIRE GENERANT UNE ALLEE DE TOURBILLONS DE BENARD-VON KARMAN. CES RESULTATS EXPERIMENTAUX PRESENTENT LES CHAMPS DE VITESSE ET DE TEMPERATURE POUR PLUSIEURS POSITIONS DE SOURCE SUR ET EN DEHORS DE LA LIGNE CENTRALE DU SILLAGE. CES CHAMPS ONT ETE MESURES SIMULTANEMENT OU SUCCESSIVEMENT AU MOYEN DE LA VDL A DEUX COMPOSANTES ET D'UN FIL FROID SUR DES DISTANCES EN AVAL DE LA SOURCE CORRESPONDANT AU CHAMP PROCHE. L'UTILISATION SIMULTANEE DE LA VDL ET D'UN FIL FROID NOUS A CONDUIT A ETUDIER LES EFFETS DE CONTAMINATION DU FIL FROID PAR LA PRESENCE DE PARTICULES SUR SA SURFACE. LA CONTAMINATION EST LE FAIT D'UN NOMBRE CONSTANT DE GOUTTES DONT LE DIAMETRE AUGMENTE AVEC LE TEMPS D'EXPOSITION. LA FONCTION DE TRANSFERT DU FIL FROID DECROIT DANS UNE GAMME DE FREQUENCES CARACTERISTIQUES DE L'INVERSE DE LA CONSTANTE DE TEMPS DES GOUTTES. CE TRAVAIL A PERMIS EGALEMENT DE RESOUDRE LE PROBLEME DU CHOIX DE LA SOURCE AFIN D'EVITER L'APPARITION DE PHENOMENES DE CONTROLE. L'ETUDE A ETE MENEE PRINCIPALEMENT A UN NOMBRE DE REYNOLDS RE = RE C + 15, AVEC UNE SOURCE DE CHALEUR 100 FOIS PLUS PETITE EN DIAMETRE QUE LE CYLINDRE PRINCIPAL, PLACEE A UNE SECTION SITUEE A 5D. SELON LES POSITIONS DE SOURCE Y S, LES PROCESSUS DE DIFFUSION ET DE MELANGE EVOLUENT VERS UNE SITUATION ASYMPTOTIQUE OU LA CHALEUR MARQUE L'ENSEMBLE DU SILLAGE LOINTAIN. LES CARACTERISTIQUES LAGRANGIENNES DE L'ECOULEMENT MONTRENT EN PARTICULIER UNE CROISSANCE INITIALEMENT LINEAIRE DE LA VARIANCE. LA MODELISATION DU MOMENT V' PAR UNE DIFFUSION PAR GRADIENT N'EST PAS PROBANTE MAIS PERMET DE RETROUVER DES DIFFUSIVITES ENVIRON SIX FOIS PLUS ELEVEES QUE LA DIFFUSIVITE MOLECULAIRE. CES VALEURS SONT COMPRISES ENTRE CELLES QUI RESULTERAIENT DES EFFETS D'UN TOURBILLON OU D'UN ETIREMENT PUR. UN NOMBRE DE PRANDTL PROPRE A L'ALLEE DE BVK EST EGALEMENT DEFINI.

Download or read book Etude exp rimentale de la diffusion de la chaleur en aval d une source lin aire plac e dans une couche limite turbulente written by Pierre Paranthoën and published by . This book was released on 1978 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ETUDE DE LA DIFFUSION DE LA CHALEUR EN AVAL D UN CYLINDRE CHAUFFE A FAIBLE NOMBRE DE REYNOLS 40 written by Laurence Hamma and published by . This book was released on 1988 with total page 175 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE EXPERIMENTALE. ON UTILISE LE CHAUFFAGE DU CYLINDRE POUR MODIFIER LES PROPRIETES DU FLUIDE ET CONTROLER AINSI LE PHENOMENE TOURBILLONNAIRE. ANALYSE DU CHAMP THERMIQUE. LA TEMPERATURE EFFECTIVE CONTROLANT LE DEVELOPPEMENT DE LA DOUBLE ALLEE DE VON KARMAN EST TRES INFERIEURE A LA TEMPERATURE DE FILM. ETUDE DU COUPLAGE ENTRE UN ECOULEMENT AMONT TURBULENT ET LE SILLAGE EN AVAL DU CYLINDRE

Download or read book CONTRIBUTION A L ETUDE DE LA DIFFUSION DE LA CHALEUR A L AVAL D UNE SOURCE LINEAIRE DE CHALEUR DANS UNE COUCHE LIMITE TURBULENTE written by MOHAMED.. EL KABIRI and published by . This book was released on 1982 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: DESCRIPTION DU DISPOSITIF EXPERIMENTAL DES TECHNIQUES DE MESURE ET DES METHODES D'ETALONNAGE DES FILS CHAUDS. RESULTATS ET INTERPRETATION DES MESURES DES CHAMPS DE TEMPERATURES ET DE VITESSES

Download or read book Etude du flux la paroi l aval d une source lin aire de chaleur plac e dans une couche limite turbulente written by Michel Belorgey and published by . This book was released on 1978 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Earth Surface Processes Landforms and Sediment Deposits written by John Bridge and published by Cambridge University Press. This book was released on 2008-05 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique, advanced textbook combining sedimentology and geomorphology in a comprehensive and integrated way.

Download or read book Cities at Risk written by Helene Joffe and published by Springer Science & Business Media. This book was released on 2013-03-27 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the major growth of the world’s population over the past century, as well as rapid urbanisation, people increasingly live in crowded cities. This trend is often accompanied by proliferation of poorly built housing, uncontrolled use of land, occupation of unsafe environments and overstretched services. When a natural hazard strikes such a city many people are vulnerable to loss of life and property. This book explores what these people think and feel about the threats that they face. How do they live with perils ranging from earthquakes to monsoons, from floods to hurricanes, in the 21st century? The authors are drawn from a large range of disciplines: Psychology, Engineering, Geography, Anthropology and Urban Planning. They also reflect on how perils are represented in multiple cultures: the United States, Japan, Turkey, Bangladesh, the United Kingdom and New Zealand. The book therefore not only brings to light the ways that different cultures represent natural hazards but also the different ways in which various disciplines write about living with perils in the 21st century. The book is addressed both to researchers and to organizations involved with risk management and risk mitigation.

Download or read book Land Ocean Interaction written by D. Huntley and published by IWA Publishing. This book was released on 2000-12-01 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The UK Land-Ocean Interaction Study (LOIS) provided a major opportunity to measure and model the processes controlling the fluxes of materials between river basins and coastal seas. The main programme of research took place between 1992 and 1998, funded by the UK Natural Environment Research Council, and involved approximately 360 coastal researchers contributing to more than 70 collaborative projects. This book presents accessible summaries of key results of this research. The ten chapters of the book are written by leading contributors to the programme, and cover aspects of the physical, sedimentological, chemical and biological processes controlling fluxes between river catchments and coastal seas in temporate environments. Major overarching themes for all of the chapters include the persistence, storage, degradation and transport of pollutants from catchment to coastal sea, and an emphasis on the relevance of research for river and coastal water quality management. The chapters also describe a number of important technological advances in the measurement of processes and longer term monitoring of the fluvial, estuarine and coastal environments. Approaches to monitoring were also transferred between disciplines, in many cases for the first time. The rivers and coastal programme of LOIS was unique in its scale and inter-disciplinarity and its results are of lasting value. This book provides a useful and important summary of many of its results and an effective introduction to the research for those who want to delve more deeply into the data and published papers. It will be of interest to scientists, environmental managers and scientific policy makers. Contents Background and Context of the Programme River and Estuary Management Issues in the Humber Catchment Suspended Sediment Fluxes from River Basins River Chemistry Modelling of Large-Scale River Basins Tidal Reaches Estuarine Sediments The Intertidal Zone The Holderness Coast Estuarine Chemistry