Development of a rheological model for polymeric fluids based on FENE model
Journal Title: Polyolefins Journal - Year 2019, Vol 6, Issue 1
Abstract
Rheological models for polymer solutions and melts based on the fnitely extensible non-linear elastic (FENE) dumbbell theory are reviewed in this study. The FENE-P model that is a well-known Peterlin approximation of the FENE model, indicates noticeable deviation from original FENE predictions and also experimental results, especially in the transient flow. In addition, both FENE and FENE-P models have some shortcomings from the point of view of theory. To overcome these shortcomings, a new approximation of the FENE spring force has been established. It has been used to develop a modifed constitutive rheological model for polymeric fluids. In the procedure of modeling, the effect of non-affne deformation is introduced into the new model. Comparison between the model predictions and experimental data presented in the literature for transient and steady shear flow of polystyrene indicates that this modifed model can predict the rheological behavior of polymeric fluids with a great accuracy. The newly developed modifed model could predict different slopes that can cover the behavior of most of the polymeric fluids.
Authors and Affiliations
Hossein Ebrahimi, Ahmad Ramazani S. A. , Seyed Mohammad Davachi
Keywords
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- EP ID EP438566
- DOI 10.22063/poj.2018.2318.1125
- Views 110
- Downloads 0
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