Edge-induced shear banding in entangled polymeric fluids

Despite decades of research, the question of whether solutions and melts of highly entangled polymers exhibit shear banding as their steady state response to a steadily imposed shear flow remains controversial. From a theoretical viewpoint, an important unanswered question is whether the underlying...

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Veröffentlicht in:arXiv.org 2018-04
Hauptverfasser: Hemingway, Ewan J, Fielding, Suzanne M
Format: Artikel
Sprache:eng
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Zusammenfassung:Despite decades of research, the question of whether solutions and melts of highly entangled polymers exhibit shear banding as their steady state response to a steadily imposed shear flow remains controversial. From a theoretical viewpoint, an important unanswered question is whether the underlying constitutive curve of shear stress \(\sigma\) as a function of shear rate \(\dot{\gamma}\) (for states of homogeneous shear) is monotonic, or has a region of negative slope, \(d\sigma/d\dot{\gamma}
ISSN:2331-8422
DOI:10.48550/arxiv.1801.08798