2017/05/12 by Yuriko Renardy, Renardy, Yuriko, Michael Renardy +1
Chemical Engineering · Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Material Dynamics and Properties #Phase Equilibria and Thermodynamics #Rheology and Fluid Dynamics Studies #physics.flu-dyn
paper · pdf · doi:10.48550/arxiv.1705.04677
arxiv created 2017/05/12 · openalex publication_date 2017/05/12 · arxiv updated 2017/05/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We study the Rolie-Poly model for entangled polymers, using a singular perturbation analysis for the limit of large relaxation time. In this limit, it is shown that the model displays the characteristic features of thixotropic yield stress fluids, including yield stress hysteresis, delayed yielding and long term persistence of a decreased viscosity after cessation of flow. We focus on the startup and cessation of shear flow. We identify dynamic regimes of fast, slow and yielded dynamics, and show how the combination of these regimes can be used to describe the flow.