학술논문
Towards a mechanism for instability in channel flow of highly shear-thinning viscoelastic fluids.
Document Type
Journal
Author
Castillo, Hugo A. (4-LNDUC) AMS Author Profile; Wilson, Helen J. (4-LNDUC) AMS Author Profile
Source
Subject
76 Fluid mechanics -- 76A Foundations, constitutive equations, rheology
76A10Viscoelastic fluids
76A10
Language
English
Abstract
Summary: ``We consider the linear stability of channel flow of a shear-thinning viscoelastic fluid, replicating a instability recently discovered in experimental [1] and theoretical work [2] [MR3442379]. We have extended the fluid model to allow for an inelastic shear-thinning stress component, and find that this additional contribution always has a stabilising influence on the instability. We conclude that, while shear-thinning is critical to the instability, the mechanism is primarily elastic.''