E-Book, Englisch, Band 138, 171 Seiten, eBook
Wilson / Sircar / Shukla Viscoelastic Subdiffusive Flows
1. Auflage 2024
ISBN: 978-981-960135-6
Verlag: Springer Singapore
Format: PDF
Kopierschutz: 1 - PDF Watermark
Theory and Computation
E-Book, Englisch, Band 138, 171 Seiten, eBook
Reihe: Fluid Mechanics and Its Applications
ISBN: 978-981-960135-6
Verlag: Springer Singapore
Format: PDF
Kopierschutz: 1 - PDF Watermark
This book discusses the dynamical and rheological properties of high molecular weight entangled polymer melts, commonly known as viscoelastic subdiffusive fluids. Unlike dilute liquids, these materials exhibit molecular transport within a sublinear regime, meaning the timescale of diffusive transport is sublinear. The text emphasizes the potential of fractional calculus in modeling these fluids and introduces a novel fractional model to investigate regions of spatiotemporal instability in channel flows. At the microscale, the entanglement of polymer chains leads to localized, non-homogeneous regions with increased viscosity, which manifest as spatiotemporal macrostructures at the macroscale. To capture these macrostructures within the flow, direct numerical simulations are employed using a newly developed, physically realizable structure tensor, contributing to a deeper understanding of this complex class of fluids.
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Weitere Infos & Material
Introduction.- Preliminaries of Fractional Derivatives.- Spatiotemporal Linear Stability Analyses.- Macrostructure quantification via a Riemannian metric.- Rheodynamics of sub-diffusive channel flows.- Limitations and Future Directions.