DEVELOPPEMENTS ET APPLICATIONS DE LA TECHNIQUE DE FRACTIONNEMENT PAR COUPLAGE FLUX-FORCE AVEC GRADIENT THERMIQUE PDF Download
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Book Description
LA TECHNIQUE DE FRACTIONNEMENT PAR COUPLAGE FLUX-FORCE AVEC GRADIENT THERMIQUE (FFF THERMIQUE) EST UNE TECHNIQUE DE FRACTIONNEMENT ET DE CARACTERISATION DE MACROMOLECULES. DANS CETTE TECHNIQUE, UN GRADIENT DE TEMPERATURE EST APPLIQUE PERPENDICULAIREMENT A LA DIRECTION D'UN ECOULEMENT DE POISEUILLE. LE TEMPS DE SEJOUR D'UNE SUBSTANCE INJECTEE DANS LE CANAL FFF THERMIQUE DEPEND DE LA MASSE MOLECULAIRE ET DE LA NATURE DE LA SUBSTANCE INJECTEE, DU GRADIENT DE TEMPERATURE APPLIQUE ET DE LA NATURE DU LIQUIDE QUI S'ECOULE DANS LE CANAL. NOUS AVONS ETUDIE L'EFFET DU GRADIENT DE TEMPERATURE SUR L'ECOULEMENT. L'APPLICATION DU GRADIENT INDUIT UNE VARIATION DE LA VISCOSITE ET DE LA CONDUCTIVITE THERMIQUE DU SOLVANT AINSI QUE DU COEFFICIENT DE DIFFUSION ET DU COEFFICIENT DE DIFFUSION THERMIQUE DE LA SUBSTANCE INJECTEE EN FONCTION DE LA POSITION TRANSVERSALE DANS LE CANAL. CETTE ETUDE NOUS A PERMIS DE SE RAPPROCHER, AUTANT QUE FAIRE SE PEUT, DES CONDITIONS REELLES DANS LESQUELLES SE DEROULE LES SEPARATIONS. LES RESULTATS DE CETTE ETUDE NOUS ONT AMENE A DEGAGER UNE PROCEDURE QUI PERMET DE DETERMINER LES COEFFICIENT SORET ET LES COEFFICIENTS DE DIFFUSION THERMIQUE D'UN POLYMERE CONNAISSANT SA RETENTION DANS UN CANAL DE FFF THERMIQUE. NOUS AVONS ENSUITE UTILISE CETTE PROCEDURE POUR ETUDIER UNE MULTITUDE DE POLYMERES DE DIFFERENTES NATURES: DES HOMOPOLYMERES ORGANOSOLUBLES ET HYDROSOLUBLES, DES COPOLYMERES DE DIFFERENTES STRUCTURES ET COMPOSITIONS. CETTE ETUDE A PERMIS LA DETERMINATION DES COEFFICIENTS DE DIFFUSION THERMIQUE DES POLYMERES ORGANOSOLUBLES, DONNEE RARE DANS LA LITTERATURE. NOUS AVONS AUSSI MONTRE QUE, SOUS CERTAINES CONDITIONS, IL EST POSSIBLE DE FRACTIONNER DES COPOLYMERES EN FONCTION DE LEURS COMPOSITION PAR FFF THERMIQUE
Book Description
LA TECHNIQUE DE FRACTIONNEMENT PAR COUPLAGE FLUX-FORCE AVEC GRADIENT THERMIQUE (FFF THERMIQUE) EST UNE TECHNIQUE DE FRACTIONNEMENT ET DE CARACTERISATION DE MACROMOLECULES. DANS CETTE TECHNIQUE, UN GRADIENT DE TEMPERATURE EST APPLIQUE PERPENDICULAIREMENT A LA DIRECTION D'UN ECOULEMENT DE POISEUILLE. LE TEMPS DE SEJOUR D'UNE SUBSTANCE INJECTEE DANS LE CANAL FFF THERMIQUE DEPEND DE LA MASSE MOLECULAIRE ET DE LA NATURE DE LA SUBSTANCE INJECTEE, DU GRADIENT DE TEMPERATURE APPLIQUE ET DE LA NATURE DU LIQUIDE QUI S'ECOULE DANS LE CANAL. NOUS AVONS ETUDIE L'EFFET DU GRADIENT DE TEMPERATURE SUR L'ECOULEMENT. L'APPLICATION DU GRADIENT INDUIT UNE VARIATION DE LA VISCOSITE ET DE LA CONDUCTIVITE THERMIQUE DU SOLVANT AINSI QUE DU COEFFICIENT DE DIFFUSION ET DU COEFFICIENT DE DIFFUSION THERMIQUE DE LA SUBSTANCE INJECTEE EN FONCTION DE LA POSITION TRANSVERSALE DANS LE CANAL. CETTE ETUDE NOUS A PERMIS DE SE RAPPROCHER, AUTANT QUE FAIRE SE PEUT, DES CONDITIONS REELLES DANS LESQUELLES SE DEROULE LES SEPARATIONS. LES RESULTATS DE CETTE ETUDE NOUS ONT AMENE A DEGAGER UNE PROCEDURE QUI PERMET DE DETERMINER LES COEFFICIENT SORET ET LES COEFFICIENTS DE DIFFUSION THERMIQUE D'UN POLYMERE CONNAISSANT SA RETENTION DANS UN CANAL DE FFF THERMIQUE. NOUS AVONS ENSUITE UTILISE CETTE PROCEDURE POUR ETUDIER UNE MULTITUDE DE POLYMERES DE DIFFERENTES NATURES: DES HOMOPOLYMERES ORGANOSOLUBLES ET HYDROSOLUBLES, DES COPOLYMERES DE DIFFERENTES STRUCTURES ET COMPOSITIONS. CETTE ETUDE A PERMIS LA DETERMINATION DES COEFFICIENTS DE DIFFUSION THERMIQUE DES POLYMERES ORGANOSOLUBLES, DONNEE RARE DANS LA LITTERATURE. NOUS AVONS AUSSI MONTRE QUE, SOUS CERTAINES CONDITIONS, IL EST POSSIBLE DE FRACTIONNER DES COPOLYMERES EN FONCTION DE LEURS COMPOSITION PAR FFF THERMIQUE
Author: Sofiane Amziane Publisher: John Wiley & Sons ISBN: 111857706X Category : Technology & Engineering Languages : en Pages : 332
Book Description
Using plant material as raw materials for construction is a relatively recent and original topic of research. This book presents an overview of the current knowledge on the material properties and environmental impact of construction materials made from plant particles, which are renewable, recyclable and easily available. It focuses on particles and as well on fibers issued from hemp plant, as well as discussing hemp concretes. The book begins by setting the environmental, economic and social context of agro-concretes, before discussing the nature of plant-based aggregates and binders. The formulation, implementation and mechanical behavior of such building materials are the subject of the following chapters. The focus is then put upon the hygrothermal behavior and acoustical properties of hempcrete, followed by the use of plant-based concretes in structures. The book concludes with the study of life-cycle analysis (LCA) of the environmental characteristics of a banked hempcrete wall on a wooden skeleton. Contents 1. Environmental, Economic and Social Context of Agro-Concretes, Vincent Nozahic and Sofiane Amziane. 2. Characterization of Plant-Based Aggregates. Vincent Picandet. 3. Binders, Gilles Escadeillas, Camille Magniont, Sofiane Amziane and Vincent Nozahic. 4. Formulation and Implementation, Christophe Lanos, Florence Collet, Gérard Lenain and Yves Hustache. 5. Mechanical Behavior, Laurent Arnaud, Sofiane Amziane, Vincent Nozahic and Etienne Gourlay. 6. Hygrothermal Behavior of Hempcrete, Laurent Arnaud, Driss Samri and Étienne Gourlay. 7. Acoustical Properties of Hemp Concretes, Philippe Glé, Emmanuel Gourdon and Laurent Arnaud. 8. Plant-Based Concretes in Structures: Structural Aspect – Addition of a Wooden Support to Absorb the Strain, Philippe Munoz and Didier Pipet. 9. Examination of the Environmental Characteristics of a Banked Hempcrete Wall on a Wooden Skeleton, by Lifecycle Analysis: Feedback on the LCA Experiment from 2005, Marie-Pierre Boutin and Cyril Flamin. About the Authors Sofiane Amziane is Professor and head of the Civil Engineering department at POLYTECH Clermont-Ferrand in France. He is also in charge of the research program dealing with bio-based building materials at Blaise Pascal University (Institut Pascal, Clermont Ferrand, France). He is the secretary of the RILEM Technical Committee 236-BBM dealing with bio-based building materials and the author or co-author of over one hundred papers in scientific journals such as Cement and Concrete Research, Composite Structures or Construction Building Materials as well as international conferences. Laurent Arnaud is a Bridges, Waters and Forestry Engineer (Ingénieur des Ponts, Eaux et Forêts) and researcher at Joseph Fourier University in Grenoble, France. He is also Professor at ENTPE (Ecole Nationale des Travaux Publics de l’Etat). Trained in the field of mechanical engineering, his research has been directed toward the characterization and development of new materials for civil engineering and construction. He is head of the international committee at RILEM – BBM, as well as the author of more than one hundred publications, and holder of an international invention patent.
Author: J. Gautheyrou Publisher: CRC Press ISBN: 9789054107163 Category : Technology & Engineering Languages : en Pages : 514
Book Description
The objective of this book is to provide a better understanding of tools for soil analysis in order to use them more efficiently. It covers sampling problems as well as difficulties relating to actual analysis and quality control.
Author: Matthias Finkbeiner Publisher: Springer Science & Business Media ISBN: 9400718993 Category : Science Languages : en Pages : 618
Book Description
This book is a selection of the most relevant contributions to the LCM 2011 conference in Berlin. The material explores scientific and practical solutions to incorporating life cycle approaches into strategic and operational decision making. There are several sections addressing methodological topics such as LCSM approaches, methods and tools, while more application-oriented sections deal with the implementation of these approaches in relevant industrial sectors including agriculture and food, packaging, energy, electronics and ICT, and mobility.
Author: M. N. Rajeevan Publisher: Springer ISBN: 9811025312 Category : Science Languages : en Pages : 326
Book Description
The objective of the book is to make a comprehensive documentation of the observed variability and change of the regional climate system over the Indian region using the past observed data. The book addresses all the important parameters of regional climate system so that a physically consistent view of the changes of the climate system is documented. The book contains 16 chapters written by the subject experts from different academic and research institutes in India. The book addresses all important components/parameters of the climate system, like rainfall, temperature, humidity, clouds, moisture, sea surface temperature and ocean heat content, sea level, glaciers and snow cover, tropical cyclones and monsoon depressions, extreme rainfall and rainstorms, heat waves and cold waves, meteorological droughts, aerosols, atmospheric aerosols, ozone and trace gases and atmospheric radiative fluxes. One chapter deals with the past monsoon using monsoon proxy data. The last chapter deals with the future climate change projections over the Indian region (rainfall and temperature) made using coupled climate models. Most of the analyses (especially on rainfall, temperature, extreme rainfall, sea surface temperature, meteorological droughts) are based on the data for a longer period of 110 years, 1901–2010. For some other parameters like moisture, clouds, heat waves and cold waves, atmospheric aerosols, ozone and trace gases and radiative fluxes, data of shorter period have been used. The articles documented inter-annual and decadal variability in addition to documenting long term trends of different parameters. The trends have been tested for statistical significance using standard techniques. It is expected that the present book will be an excellent reference material for researchers as well as for policy makers. These results will be useful in interpreting future climate change scenarios over the region being projected using coupled climate models. Further analysis of these results is required for attributing the observed variability and change to natural and anthropogenic activities.
Author: John Henry Lorentz Publisher: Historical Dictionaries of Asia, Oceania, and the Middle East ISBN: Category : History Languages : en Pages : 570
Book Description
Provides an overview of specific events, movements, people, political and social groups, places, trends, and chronology. Allows for considerable exploration of a number of historical and contemporary topics and issues. The modern period, defined as 1800-present, is covered extensively.
Author: M. Kaennel Publisher: Springer Science & Business Media ISBN: 3642795358 Category : Science Languages : en Pages : 474
Book Description
Forest decline became a matter of public and scientific concern in France in 1983 when conifers in the Vosges mountains were found to exhibit unusual crown deterioration. An impassioned controversy on a supposedly large scale forest health problem was then in full swing in Central Europe. A co-ordinated research programme entitled DEFORPA ("Deperissement des For~ts et Pollution AtmospMrique") was launched in 1984. This programme ran from 1984 to 1991 and a number of projects are still in progress. The Programme was sponsored by three French ministries (Enviroument, Agriculture and Forestry, Research and Technologyl), several state agencies, various regional authorities and the Commission of the European Communities (DO xn and DG VI). Initially, emphasis was solely laid on the understanding of forest decline in the mountainous areas - because damage was most obvious there - in relation to natural and man-made factors. Air pollution was given high but not overwhelming priority. Thus, the DEFORPA Programme was not in its essence a nation-wide assessment of air pollution effects, unlike a number of national acidification research programmes in Europe and North America. During. the programme, however, the areas of concern expanded. In particular, research into water acidification in the Vosges mountains was developed in parallel with the DEFORPA Programme, and possible eutrophication of the ground flora in northeastern France became the subject of new research.
Author: C. Mathew Mate Publisher: Oxford University Press, USA ISBN: 0198526784 Category : Science Languages : en Pages : 348
Book Description
Friction, lubrication, adhesion, and wear are prevalent physical phenomena in everyday life and in many key technologies. This book explains how these tribological phenomena originate from atomistic and microscale physical phenomena and shows how this understanding can be used to solve macroscale tribology problems. The book is intended to serve both as a textbook for advanced undergraduate and graduate courses in tribology and as an introduction to the field for those scientists and engineers working with technologies where a good grasp of tribology is essential.
Author: JAMEL EDDINE.. BELGAIED
Author: JAMEL EDDINE.. BELGAIED
Author: Sofiane Amziane
Author: J. Gautheyrou
Author: Eric Servat
Author: Matthias Finkbeiner
Author: M. N. Rajeevan
Author: 
Author: John Henry Lorentz
Author: M. Kaennel
Author: C. Mathew Mate