Multiscale simulations of viscoelastic fluids in complex geometries using a finitely extensible nonlinear elastic transient network model

Gómez-López, A., Vargas, R. O., Mil-Martínez, A. and Phillips, T. N. ORCID: https://orcid.org/0000-0001-6455-1205 2024. Multiscale simulations of viscoelastic fluids in complex geometries using a finitely extensible nonlinear elastic transient network model. Physics of Fluids 36 (4) , 043117. 10.1063/5.0203787

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Abstract

This paper presents a novel implementation of a numerical scheme for predicting complex flows of viscoelastic fluids using a finitely extensible nonlinear elastic (FENE) transient network model. This model extends the FENE model by incorporating chain interactions and accounting for the way in which the maximum chain length, drag, and relaxation time are influenced by entanglement and disentanglement processes. Three different initial networks are considered (disentanglement, entanglement, and aleatory), and the influence of variables such as the kinetic rate constants, elasticity, and chain length on the microstate concentration, stresses, and drag force is investigated. It is shown that although the concentrations of the microstates are independent of the Weissenberg number and the maximum extension length, the stresses and hence the drag are influenced by them.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Mathematics
Publisher:	American Institute of Physics
ISSN:	1070-6631
Date of First Compliant Deposit:	15 April 2024
Date of Acceptance:	29 March 2024
Last Modified:	23 Apr 2024 09:32
URI:	https://orca.cardiff.ac.uk/id/eprint/167948

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