Large-amplitude oscillatory shear flow simulation for a FENE fluid

In this work, the FENE dumbbell model under small- and large-amplitude oscillatory shear flows using a micro-macro approach is presented. This approach involves the evolution of an ensemble of Brownian Configuration Fields which describes the polymer dynamics of the microscopic scale and the momentu...

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Bibliographic Details
Published in:Rheologica acta 2019-05, Vol.58 (5), p.241-260
Main Authors: Gómez-López, Aldo, Ferrer, Víctor H., Rincón, Eduardo, Aguayo, Juan P., Chávez, Ángel E., Vargas, René O.
Format: Article
Language:English
Subjects:
Amplitudes
Characterization and Evaluation of Materials
Chemistry and Materials Science
Complex Fluids and Microfluidics
Computer simulation
Deborah number
Dimensionless numbers
Flow simulation
Food Science
Frequency analysis
Materials Science
Mechanical Engineering
Original Contribution
Polymer Sciences
Polymers
Shear flow
Shear stress
Soft and Granular Matter
Strain rate
Viscosity ratio
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Summary:In this work, the FENE dumbbell model under small- and large-amplitude oscillatory shear flows using a micro-macro approach is presented. This approach involves the evolution of an ensemble of Brownian Configuration Fields which describes the polymer dynamics of the microscopic scale and the momentum equation describes the macroscopic scale. The Lissajous curves for the shear stress and the first normal stress difference versus the instantaneous strain or strain rate for the elastic or viscous projection are shown. The influences of the solvent/polymer viscosity ratio, the maximum extension length, and the relation between strain rate and frequency are analyzed. An important finding is the self-intersection of the Lissajous curves, which forms secondary loops for short extension lengths and high Weissenberg/Deborah dimensionless numbers ratio.
ISSN:0035-4511
1435-1528
DOI:10.1007/s00397-019-01145-z