Article
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Macro-Micro Coupled Simulations of Dilute Viscoelastic Fluids
Version 1
: Received: 4 October 2023 / Approved: 5 October 2023 / Online: 6 October 2023 (05:52:22 CEST)
A peer-reviewed article of this Preprint also exists.
Cromer, M.; Vasquez, P.A. Macro–Micro-Coupled Simulations of Dilute Viscoelastic Fluids. Appl. Sci. 2023, 13, 12265. Cromer, M.; Vasquez, P.A. Macro–Micro-Coupled Simulations of Dilute Viscoelastic Fluids. Appl. Sci. 2023, 13, 12265.
Abstract
Modeling the flow of polymer solutions requires knowledge at various length and time scales. The macroscopic behavior is described by the overall velocity, pressure and stress. The polymeric contribution to the stress requires knowledge of the evolution of polymer chains. In this work, we use a microscopic model, the finitely extensible nonlinear elastic (FENE) model, to capture the polymer behavior. The benefit of microscopic models is they remain faithful to the polymer dynamics without information loss via averaging. The downside is the computational cost needed to solve the thousands to millions of differential equations describing the microstructure. We thus describe a multiscale flow solver that utilizes GPUs for massively parallel, efficient simulations. We compare and contrast the microscopic model with its macroscopic counterpart under various flow conditions. In particular, significant differences are observed under nonlinear flow conditions, where the polymers become highly stretched and oriented.
Keywords
Polymer; Multiscale; Fluid dynamics; Viscoelastic; Capillary thinning
Subject
Computer Science and Mathematics, Applied Mathematics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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