Multiscale modeling of complex fluids under SAOS and LAOS using a combined FENE transient network model

Vargas, René O, Gómez-López, Aldo, Escandón, Juan Pablo, Mil-Martı́nez, Rubén and Phillips, Timothy ORCID: https://orcid.org/0000-0001-6455-1205 2023. Multiscale modeling of complex fluids under SAOS and LAOS using a combined FENE transient network model. Physica Scripta 98 (2) , 025213. 10.1088/1402-4896/acb23b

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Abstract

The multiscale modeling of complex fluids under small and large amplitude oscillatory shear flow using non-linear kinetic and transient network models is presented. The kinetics of microstates is analogous to chemical kinetics, which defines the physical macromolecule interaction in a Newtonian fluid, and the concentration of microstates defines a variable maximum length of extension for each microstate. The effect of important parameters like viscosity ratio, chain length, viscoelasticity, kinetic rate constants, for different initial entanglement scenarios (entangled, disentangled and aleatory) are analyzed. The Lissajous curves for the shear stress and the first normal stress difference versus the instantaneous strain or strain-rate are shown. The self-intersection of the Lissajous curves or secondary loops is shown to depend on the kinetic rate constants, the maximum extension length, and the elasticity

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Mathematics
Publisher:	IOP Publishing
ISSN:	0031-8949
Date of First Compliant Deposit:	13 January 2023
Date of Acceptance:	11 January 2023
Last Modified:	04 May 2023 20:30
URI:	https://orca.cardiff.ac.uk/id/eprint/155798

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