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Visualisation And Birefringence Of Polymer Melt Flows
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Book Synopsis Visualisation and Birefringence of Polymer Melt Flows by : Charoen Nakason
Download or read book Visualisation and Birefringence of Polymer Melt Flows written by Charoen Nakason and published by . This book was released on 1997 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: A flow visualisation cell was used together with image capture and image processing systems to observe the convergent flows of polymer melts in steady state single screw extrusion through a slit die. This technique provided useful information for assessment of any vortex and entry flow patterns for different flow conditions and various polymer types. Entry flow patterns are characterised in terms of natural entry profile, vortex boundary profile, location of vortex centre and detachment length. Stress birefringence provides principal stress difference measurements, which can be obtained from the digital image analysis of isochromatic fringes. The assessment of stress distribution in terms of centre line principal stress difference (PSD) or the extensional stress along the centre line of a slit, shear stress and first normal stress difference are obtained from the digitised isochromatic and isoclinic fringes together with stress optical coefficients via the stress optical law. Stress distributions can be combined with flow velocity measurements for the full entry flow. Average strain rate fields for the polymer melts flow at various flow conditions and different polymer types are therefore obtained. This technique also provides the assessment of apparent extensional viscosity from the ratio of extensional stress (...) and extensional strain rate (...). Two different approaches of the extensional viscosity assessments: particle tracking and digitised entry profile methods are established. Fully developed flow regions in terms of entrance and exit length for polymer melt flows of various flow conditions are determined using gradients of centre line extensional stress (or PSD) and the parallel patterns of isochromatic fringes in a downstrewn slit.
Book Synopsis A Study of Polymer Melt Flow by Means of Flow Birefringence Streak Photography by : Leonard Hugh Drexler
Download or read book A Study of Polymer Melt Flow by Means of Flow Birefringence Streak Photography written by Leonard Hugh Drexler and published by . This book was released on 1973 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Apparatus of Study Flow Birefringence of Oriented Polymer Melts by : Kenneth Kubiak
Download or read book An Apparatus of Study Flow Birefringence of Oriented Polymer Melts written by Kenneth Kubiak and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flow Properties of Polymer Melts by : J. A. Brydson
Download or read book Flow Properties of Polymer Melts written by J. A. Brydson and published by . This book was released on 1981 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rheology for Polymer Melt Processing by : J.-M. Piau
Download or read book Rheology for Polymer Melt Processing written by J.-M. Piau and published by Elsevier. This book was released on 1996-10-10 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the main results obtained by different laboratories involved in the research group Rheology for polymer melt processing which is associated with French universities, schools of engineering, and the CNRS (Centre National de la Recherche Scientifique - France). The group comprises some 15 research laboratories of varied disciplines (chemistry, physics, material sciences, mechanics, mathematics), but with a common challenge viz. to enhance the understanding of the relationships between macromolecular species, their rheology and their processing. Some crucial issues of polymer science have been addressed: correlation of viscoelastic macroscopic bulk property measurements and models, slip at the wall, extrusion defects, correlation between numerical flow simulations and experiments. Features of the book: • The book is unique in that it allows one to grasp the key issues in polymer rheology and processing at once through a series of detailed state-of-the-art contributions, which were previously scattered throughout the literature. • Each paper was reviewed by experts and the book editors and some coordination was established in order to achieve a readable and easy access style. • Papers have been grouped in sections covering successively: Molecular dynamics, Constitutive equations and numerical modelling, Simple and complex flows. • Each paper can be read independently. Since the book is intended as an introduction to the main topics in polymer processing, it will be of interest to graduate students as well as to scientists in academic and industrial laboratories.
Book Synopsis Rheological Measurement by : A.A. Collyer
Download or read book Rheological Measurement written by A.A. Collyer and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 653 pages. Available in PDF, EPUB and Kindle. Book excerpt: In many cases rheological measurements are carried out in the simplest of geometries, but the interpretation involved in obtaining the rheological parameters of the test fluids from these measurements is surprisingly complex. The purpose of this book is to emphasise the points on which most workers in the field agree, and to let the authors deal with the contentious points according to their own beliefs and experience. This work represents a summary of the current thought on rheological meas urement by experts in the various techniques. When making measurements and obtaining from them parameters that describe the flow behaviour of the test fluids, it is essential that the experimentalist understands the underlying theory and shortcomings of the measurement technique, that he is aware of the likely microstructure of the fluid, and that from this he can appreciate how the fluid and the measuring system will interact with each other. It is this interaction that gives both the required rheological parameters of the fluids and the artefacts that confuse the issue. This book covers the main rheological measurement techniques from capillary, slit and stretching flows to rotational and oscillatory rheometry in various geometries including sliding plate measurements. These topics are backed up by chapters on more practical aspects, such as commercial instruments, and on computer control and data acquisition. The chapters deal with the basic methods, how the measurements are taken, and what assumptions and interpretations are made to obtain valid data on the test fluids.
Book Synopsis Flow Birefringence and Velocity Measurements for Polymer Melts in a Cross-slot Flow Channel by : Johannes Matthieu Soulages
Download or read book Flow Birefringence and Velocity Measurements for Polymer Melts in a Cross-slot Flow Channel written by Johannes Matthieu Soulages and published by . This book was released on 2007 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polymer Melt Fracture by : Rudy Koopmans
Download or read book Polymer Melt Fracture written by Rudy Koopmans and published by CRC Press. This book was released on 2010-08-03 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: The continually growing plastics market consists of more than 250 million tons of product annually, making the recurring problem of polymer melt fracture an acute issue in the extrusion of these materials. Presenting a pictorial library of the different forms of melt fracture and real industrial extrusion melt fracture phenomena, Polymer Melt Fract
Book Synopsis A Flow Birefringence Study of Stresses in Sheared Polymer Melts by : Franciscus H. Gortemaker
Download or read book A Flow Birefringence Study of Stresses in Sheared Polymer Melts written by Franciscus H. Gortemaker and published by . This book was released on 1976 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flow Visualization written by and published by . This book was released on 1977 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flow Visualisation Studies of Polymer Melts by : A. A. J. Al-Zubaidi
Download or read book Flow Visualisation Studies of Polymer Melts written by A. A. J. Al-Zubaidi and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Anisotropic Thermal Diffusivity and Flow Birefringence in Polymer Melts Following Step Strain Deformations by : Venkataraman Balasubramanian
Download or read book Anisotropic Thermal Diffusivity and Flow Birefringence in Polymer Melts Following Step Strain Deformations written by Venkataraman Balasubramanian and published by . This book was released on 2004 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling and Simulation of Crystallization Processes in Polymer Melt Flows by : Stefan Descher
Download or read book Modeling and Simulation of Crystallization Processes in Polymer Melt Flows written by Stefan Descher and published by BoD – Books on Demand. This book was released on 2020-01-01 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describing crystallization processes in polymer melt flows involves many effects. Objective of this work is to capture a selection in a simulation environment, for a certain material, starting from executing experiments on. This means aspects of experimental investigations, modeling and special numerical methods used to create a simulation environment will be highlighted. Because this involves many fields, works covering all aspects are rare1. It is intended to contribute such a work by the publication of this thesis.
Book Synopsis A Flow Birefringence Analysis of the Hole Pressure and the Higashitani-Pritchard Theory for Polymer Melts by : R. Daniel Pike
Download or read book A Flow Birefringence Analysis of the Hole Pressure and the Higashitani-Pritchard Theory for Polymer Melts written by R. Daniel Pike and published by . This book was released on 1984 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flow Visualization ; Proceedings of the International Symposium on Flow Visualization, October 12-14, 1977, Tokyo, Japan by : Tsuyoshi Asanuma
Download or read book Flow Visualization ; Proceedings of the International Symposium on Flow Visualization, October 12-14, 1977, Tokyo, Japan written by Tsuyoshi Asanuma and published by Hemisphere Pub. This book was released on 1979 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computational Rheology by : Robert G Owens
Download or read book Computational Rheology written by Robert G Owens and published by World Scientific. This book was released on 2002-05-29 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern day high-performance computers are making available to 21st-century scientists solutions to rheological flow problems of ever-increasing complexity. Computational rheology is a fast-moving subject — problems which only 10 years ago were intractable, such as 3D transient flows of polymeric liquids, non-isothermal non-Newtonian flows or flows of highly elastic liquids through complex geometries, are now being tackled owing to the availability of parallel computers, adaptive methods and advances in constitutive modelling.Computational Rheology traces the development of numerical methods for non-Newtonian flows from the late 1960's to the present day. It begins with broad coverage of non-Newtonian fluids, including their mathematical modelling and analysis, before specific computational techniques are discussed. The application of these techniques to some important rheological flow problems of academic and industrial interest is then treated in a detailed and up-to-date exposition. Finally, the reader is kept abreast of topics at the cutting edge of research in computational applied mathematics, such as adaptivity and stochastic partial differential equations.All the topics in this book are dealt with from an elementary level and this makes the text suitable for advanced undergraduate and graduate students, as well as experienced researchers from both the academic and industrial communities.
Book Synopsis Computational Methods In Engineering: Advances & Applications - Proceedings Of The International Conference (In 2 Volumes) by : Khin-yong Lam
Download or read book Computational Methods In Engineering: Advances & Applications - Proceedings Of The International Conference (In 2 Volumes) written by Khin-yong Lam and published by World Scientific. This book was released on 1992-10-29 with total page 1556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
