Rhéophysique Des Fluides Complexes PDF Download

Author: Abdoulaye Fall
Publisher: Omniscriptum
ISBN: 9786131572036
Category :
Languages : fr
Pages : 204

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Book Description
Ce travail exp rimental s'articule autour de deux aspects rencontr s chez les fluides complexes: le seuil d' coulement et le seuil de rh o paississement. Dans un premier temps, nous avons tudi l'origine du seuil d' coulement. Nous avons, partir de techniques de rh ologie classique et locale par IRM, montr que le seuil d' coulement des suspensions mod les n'est observ que par l'introduction d'un contraste de densit entre les particules et le fluide suspendant. Ce contraste de densit introduit alors une consolidation l' chelle des particules. Le seuil d' coulement appara t alors sans aucune s dimentation macroscopique de l' chantillon. Dans un second temps, nous avons tudi un ph nom ne de structuration dynamique, sous coulement: le rh o paississement. Ainsi, nous montrons que le rh o paississement de la suspension de f cule de ma s est une cons quence directe de la dilatance de Reynolds. Par ailleurs, le syst me mod le, contrairement la suspension de f cule de ma s, pr sente un rh o paississement qui est accompagn d'un r gime de localisation qui devient responsable d'un blocage partiel de l' coulement dans l'entrefer de la g om trie de Couette.

Author: Patrick Oswald
Publisher: Humensis
ISBN: 2701185521
Category : Science
Languages : fr
Pages : 608

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Book Description
Pourquoi faut-il battre le fer tant qu'il est chaud ? Comment se propagent les ondes sismiques à l'intérieur de la Terre ? Pourquoi le caoutchouc est-il si élastique ? Quels sont les secrets d'une bonne peinture ou d'un afficheur à cristal liquide ? Autant de questions qui relèvent aussi bien de l'élasticité et de laplasticité des solides, que de l'hydrodynamique des liquides simples ou la rhéologie des fluides complexes. Pour la première fois, cet ouvrage développe une vision unifiée de ces disciplines, en s'appuyant sur la mécanique des milieux continus au niveaumacroscopique, et sur la mécanique statistique et la physique des défauts au niveau microscopique. Illustré par de nombreuses expériences et exemples d'applications, il s'adresse aux étudiants de mastère/doctorat comme aux chercheurs et ingénieurs. Un livre de référence qui marquera les esprits.

Author: Abhijit P. Deshpande
Publisher: Springer Science & Business Media
ISBN: 1441964940
Category : Technology & Engineering
Languages : en
Pages : 259

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Book Description
The aim of the School on Rheology of Complex fluids is to bring together young researchers and teachers from educational and R&D institutions, and expose them to the basic concepts and research techniques used in the study of rheological behavior of complex fluids. The lectures will be delivered by well-recognized experts. The book contents will be based on the lecture notes of the school.

Author: Patrick Navard
Publisher: Springer Science & Business Media
ISBN: 3709104211
Category : Science
Languages : en
Pages : 407

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Book Description
This book provides an essential overview of the science of polysaccharides. It both approaches polysaccharides as a polymer class and provides detailed descriptions of most major polysaccharides (cellulose, mannan, xylan, chitin-chitosan, cyclodextrines). Owing to the multidisciplinary character of the European Polysaccharide Network of Excellence (EPNOE), the book describes all main aspects of polysaccharide science and technology (biology, enzymology, physics, chemistry, materials science and processing). Notations and concepts follow a uniform format throughout the whole work in order to create a valuable reference book on the field of polysaccharide science. Owing to the major importance of industry in the EPNOE, concrete applications are also described in detail.

Author: Tim Liebert
Publisher: OUP USA
ISBN: 9780841200067
Category : Science
Languages : en
Pages : 424

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Book Description
This book will give an overview of the current state-of-the-art concerning the activation and dissolution of cellulose in a broad variety of solvents. Research on this topic can lead to new pathways for the utilization of the most abundant terrestrial biomolecule and may therefore be the basis for new green strategies towards advanced materials.

Author: J F Kennedy
Publisher: Elsevier
ISBN: 1845698533
Category : Technology & Engineering
Languages : en
Pages : 606

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Book Description
The proceedings of the Cellucon Trust conference held in Lund, Sweden, in 1993. The latest scientific advances are covered, environmental concerns and the consequent economic costs are dealt with. The papers have surprisingly wide applications across a number of industries, including food processing, pharmaceuticals, chemical processing, civil engineering and composite materials production.

Author: K. te Nijenhuis
Publisher: Wiley
ISBN: 9780471973447
Category : Technology & Engineering
Languages : en
Pages : 0

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Book Description
This, the first Wiley publication of a Polymer Network Group Review, presents articles resulting from the 13th Polymer Network Group conference that took place in the Netherlands in September 1996. The scope of the conference was "Chemical versus Physical Networks: Formation and Control of Properties". The resulting contributions provided new insight into recent trends in liquid crystalline and anisotropic networks, nanostructures and new developments in network theory and modeling. The papers published in this volume have been divided into 7 sections: Thermoreversible and Biopolymer Gels Formation of Covalent Networks Liquid Crystalline Networks Characterisation of Networks Critical Gels Heterogeneous Gels Swelling of Networks

Author: António M. Cunha
Publisher: Springer
ISBN: 9780792364498
Category : Technology & Engineering
Languages : en
Pages : 375

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Book Description
30 years ago, polymer processing was considered to be a set of operations aiming at imparting a desired shape to the material, while its final properties were defined exclu sively by the molecular structure and architecture resulted from the respective synthetic approaches. These two fields of knowledge - polymer processing and polymer structure - grew closer as several scientific and technological works disclosed the microstructure and other morphological features developed by polymeric systems upon different process ing conditions. Even before the real understanding of the polymer structural details, engineers were able to make use of the effect of molecular orientation and to manufacture polymeric fi bres with enhanced properties in terms of stiffness and strength. However, it was during the 1970s that the scientific community started to relate microstructure development and the thermomechanical environment associated to different processing techniques. Ever since, very important works were done on semi crystalline, amorphous or blended polymers in order to identify and, recently, to predict the effect of the imposed shear fields and cool ing gradients on the final product properties. These efforts led to more accurate process ing methods and stimulated new engineering approaches, such as property enhancement through out-of-the-processing as well as on-line control. Modem processing technology has developed further towards the nano level, enabling impacts on the macromolecular structure.

Author: Thomas Heinze
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 384

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Book Description
With contributions from many of the leaders in the field, this volume describes polysaccharide derivatives and new methods with unusual derivatives. It also highlights methods for modifying cellulose, nature's most abundant polymer, to make it accessible for numerous materials and products.