Prediction of Mechanical Degraduation of Flexible Polymer Chains in Turbulent Flow PDF Download

Author: Yuan-Jai (Leif). Hsieh
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author: Tuan Q. Nguyen
Publisher: Springer Science & Business Media
ISBN: 3642582524
Category : Technology & Engineering
Languages : en
Pages : 413

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Book Description
The behavior of polymer solutions in simple shear flows has been the subject of considerable research in the past. On the other hand, reports on polymers in elongational flow have appeared comparatively recently in the literature. Elongational flow with an inherent low vorticity is known to be more effective in extending polymer chains than simple shear flow and thus is more interesting from the point of view of basic (molecular chain dynamics at high deformation) and applied polymer science (rheology, fiber extrusion, drag reduction, flow through porous media). Undoubtly, one landmark in the field of polymer dynamics in elongational flow was the notion of critical strain-rate for chain extension, initially put forward by A. Peterlin (1966) and later refined into the "coil-stretching" transition by P. G. de Gennes and H. Hinch (1974). In the two decades which followed, significant progress in the understanding of chain conformation in "strong" flow has been accomplished through a combination of advances in instrumentation, computation techniques and theoretical studies. As a result of the multidisciplinary nature of the field, information on polymer chains in "strong" flow is accessible only from reviews and research papers scattered in disparate scientific journals. An important objective of this book is to remedy that situation by providing the reader with up-to-date knowledge in a single volume. The editors therefore invited leading specialists to provide both fundamental and applied information on the multiple facets of chain deformation in elongational flow.

Author: Committee D-2 Staff
Publisher: ASTM International
ISBN:
Category : Fluids
Languages : en
Pages : 91

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Author: Hiromi Yamakawa
Publisher: Springer Science & Business Media
ISBN: 3642608175
Category : Technology & Engineering
Languages : en
Pages : 431

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A new and general model, called the "helical wormlike chain", for both flexible and semi-flexible polymer chains is presented. Statistical-mechanical, hydrodynamic, and dynamic theories of their solution properties are developed on the basis of this model. There are also given analysis of recent experimental data by the use of these theories for flexible polymers over a wide range of molecular weight, including the oligomer region, and for semi-flexible polymers, including biological macromolecules such as DNA. The book includes a reasonable number of theoretical equations, tables, figures, and computer-aided forms, enough to provide understanding of the basic theory and to facilitate its application to experimental data for the polymer molecular characterization.

Author: Leszek A. Utracki
Publisher: John Wiley & Sons
ISBN: 0470193425
Category : Technology & Engineering
Languages : en
Pages : 805

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Providing a comprehensive review of the state-of-the-art advanced research in the field, Polymer Physics explores the interrelationships among polymer structure, morphology, and physical and mechanical behavior. Featuring contributions from renowned experts, the book covers the basics of important areas in polymer physics while projecting into the future, making it a valuable resource for students and chemists, chemical engineers, materials scientists, and polymer scientists as well as professionals in related industries.

Author: Bayode Owolabi
Publisher: Springer
ISBN: 303019745X
Category : Science
Languages : en
Pages : 141

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This book presents several new findings in the field of turbulent duct flows, which are important for a range of industrial applications. It presents both high-quality experiments and cutting-edge numerical simulations, providing a level of insight and rigour rarely found in PhD theses. The scientific advancements concern the effect of the Earth’s rotation on large duct flows, the experimental confirmation of marginal turbulence in a pressure-driven square duct flow (previously only predicted in simulations), the identification of similar marginal turbulence in wall-driven flows using simulations (for the first time by any means) and, on a separate but related topic, a comprehensive experimental study on the phenomenon of drag reduction via polymer additives in turbulent duct flows. In turn, the work on drag reduction resulted in a correlation that provides a quantitative prediction of drag reduction based on a single, measurable material property of the polymer solution, regardless of the flow geometry or concentration. The first correlation of its kind, it represents an important advancement from both a scientific and practical perspective.

Author: O Ok Park
Publisher:
ISBN:
Category :
Languages : en
Pages : 438

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Author: Julie Anne Yaple Johnson
Publisher:
ISBN:
Category : Polymers
Languages : en
Pages : 236

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Author: Cameron Tropea
Publisher: Springer Science & Business Media
ISBN: 3540251413
Category : Science
Languages : en
Pages : 1570

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Book Description
Accompanying DVD-ROM contains ... "all chapters of the Springer Handbook."--Page 3 of cover.

Author: Roman Boulatov
Publisher: Springer
ISBN: 3319228250
Category : Technology & Engineering
Languages : en
Pages : 443

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Book Description
The series Topics in Current Chemistry presents critical reviews of the present and future trends in modern chemical research. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience. Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field. Review articles for the individual volumes are invited by the volume editors. Readership: research chemists at universities or in industry, graduate students.