The Influence of Polymer Additives on Velocity and Temperature Fields: Symposium Universität — GH — Essen, Germany, June 26–28, 1984: IUTAM Symposia
Editat de Bernhard Gamperten Limba Engleză Paperback – 16 dec 2011
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Specificații
ISBN-13: 9783642826344
ISBN-10: 3642826342
Pagini: 480
Ilustrații: XXX, 446 p.
Dimensiuni: 155 x 235 x 25 mm
Greutate: 0.67 kg
Ediția:1985
Editura: Springer Berlin, Heidelberg
Colecția Springer
Seria IUTAM Symposia
Locul publicării:Berlin, Heidelberg, Germany
ISBN-10: 3642826342
Pagini: 480
Ilustrații: XXX, 446 p.
Dimensiuni: 155 x 235 x 25 mm
Greutate: 0.67 kg
Ediția:1985
Editura: Springer Berlin, Heidelberg
Colecția Springer
Seria IUTAM Symposia
Locul publicării:Berlin, Heidelberg, Germany
Public țintă
ResearchCuprins
Session I.- * Turbulent drag reduction by. polymer additives: a survey.- Session 2 Extensional Viscosity.- * A review on extensional viscosity.- Flow-induced conformation change in dilute polymer solution — A comparison between non-ionic polymers and polyelectrolytes.- The nature of flow through porous media.- An experimental study of polymer induced drag for flows through porous medium.- Session 3 Molecular Parameters I.- * Molecular parameters as a basis of structure-property-relations in the flow of polymer solutions.- Drag reduction of non-ionic surfactant mixtures.- The influence of molecular weight and molecular weight distribution on drag reduction and mechanical degradation in turbulent flow of highly dilute polymer solutions.- Session 4 Molecular Parameters II.- Influence of molecular parameters on laminar non-Newtonian and on turbulent flows of dilute polymer solutions.- The peculiarities of the structure of wall turbulence and the mechanism of drag reduction by polymer additives.- # The influence of molecular mass distribution, size and elasticity of macromolecules on friction reduction effect.- Characterization of dilute Polyacrylamide and polystyrene solutions by means of porous media flow.- The effect of grafted and ungrafted guargum on turbulent flow of water and on hydraulic conductivity of soil.- Session 5 Molecular Parameters III.- * Some fringe effects of the flow on the macromolecules in dilute polymer and on their non-Newtonian behaviour.- Aging of aqueous polymer solutions.- Model for effects of degradation on polymer drag reduction.- Elastico-viscous effects in complex flows.- Session 6 Theories I.- Turbulence measurements with viscoelastic flow in an open channel.- A mechanism for polymer drag reduction.- # A turbulence model for drag reductiondilute polymer solutions in boundary layer on a flat plate.- Session 7 Structures in Turbulence I.- * The structure near the wall in turbulent shear flow.- Statistical measurements in the turbulent flow of dilute drag-reducing polymer solutions in a round tube.- The vorticity diffusion of ?-vortices in drag reducing solutions.- Session 8 Structures in Turbulence II.- Influence of polymer additives on neutral stability of Görtler vortices.- ° Laser-Doppler measurements of vortex-shedding past small circular cylinders in dilute polymer solutions.- Influence of polymer additives on turbulence in a mixing layer.- The turbulent mixing of viscoelastic fluids in pipe flow.- Session 9 Theories II.- * A qualitative understanding of drag reduction by polymers.- Predictions of turbulent drag reduction for a linear viscoelastic fluid.- An engineering approach to modeling complex flow behavior of polymer solutions.- Session 10 Injection Experiments.- Heterogeneous drag reduction in turbulent pipe flow.- Annular injection of concentrated polymer solutions into the wall region of a turbulent pipe flow.- Turbulence structure of a developing duct flow with near-wall injection of drag reducing polymers.- Session II.- * Today and future possibilities of industrial applications of drag reduction.- Session 12 Pressure Fields, Cavitation.- Effects of a non-Newtonian fluid on the velocity distribution and pumping efficiency of peristaltic pumping.- Effect of polymer solutions on tip vortex cavitation.- The influence of non-Newtonian liquids on the cavitation thresholds and on the pressure pulse velocity in two-phase mixtures.- Session 13 Heat and Mass Transfer.- Nucleate boiling in drag-reducing polymer solutions.- Mass transfer in elongational flows of dilute polymer solutions.