Flexible Polymer Chains in Elongational Flow: Theory and Experiment

ISBN-13: 9783642635151 / Angielski / Miękka / 2012 / 401 str.

Tuan Q. Nguyen; Hans-Henning Kausch

Opis

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.

Spis treści

P.G. de Gennes: Tortured Chains: An Introduction.- J.-P. Ryckaert, C. Pierleoni: Polymer Solutions in Flows: A Non-Equilibrium Molecular Dynamics Approach.- F. Brochard-Wyart, A. Buguin: Tethered Polymer Chains Under Strong Flows: Stems and Flowers.- Y. Rabin, S. Alexander: Osmotic Pressure in Solutions of Stretched Polymers.- O.V. Borisov, A.A. Darinskii: Stretching of Polyelectrolytes in Elongational Flow.- M. Laso, M. Picasso, H.C. Öttinger: Calculation of Flows with Large Elongational Components: CONNFFESSIT Calculation of the Flow of a FENE fluid in a planar 10:1 Contraction.- B. Debbaut: Modelling and Numerical Simulation of Elongational Effects in Flows of Highly Dilute Polymeric Solutions.- J.A. Odell, S.P. Carrington: Polymer Solutions in Strong Stagnation Point Extensional Flows.- T.Y. Nguyen, R. Porouchani, H.-H. Kausch: Birefringence of Dilute PS Solutions in Abrupt Contraction Flow.- Larson, R.G., T.T. Perkins , D.E. Smith, S. Chu: The Hydrodynamics of a DNA Molecule in a Flow Field.- T.T. Perkins, D.E. Smith, S. Chu: Single Polymers in Elongational Flows: Dynamic, Steady-State, and Population-Averaged Properties.- A.J. Müller, A.E. Sáez: The Rheology of Polymer Solutions in Porous Media.-

Blurb

Flexible Polymer Chain Dynamics in Elongational Flow fulfills a need by presenting the most important advances in the field of flexible polymer chains in "strong" flow in a single literature source. Although several excellent treatises on polymer dynamics have appeared over the years, most of them deal with polymer chains in the quiescent state or in simple shear flow. Elongational flow with an inherent low vorticity proves to be more efficient 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 spinning, drag reduction, flow through porous media). In the two decades which followed the seminal "coil-stretching" model formulated by Prof. de Gennes in 1974, 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. In this volume, articles from leading specialists provide the reader with broad coverage of the different aspects of flexible polymer chains in elongational flow while identifiying directions and challenges for future studies.