Modeling of Viscoelastic Fluid Flow Behavior in the Circular Die Using the Leonov-Like Conformational Rheological Constitutive Equations

In this paper, the flow behavior of Leonov-Like conformational rheological model, which has root in the generalized Poisson bracket formalism based on the conformation tensor, have been studied in the circular die flow. Prediction of the normal stress differences during the flow of these fluids lets...

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Bibliographic Details
Published in:Macromolecular symposia 2008-12, Vol.274 (1), p.6-10
Main Authors: Ramazani S.A, A, Kanvisi, M
Format: Article
Language:English
Subjects:
Applied sciences
circular die
conformation tensor
Constitutive equations
Constitutive relationships
Die swell
Exact sciences and technology
Fluid flow
Mathematical models
Melts
modeling
Organic polymers
Physicochemistry of polymers
Properties and characterization
Rheological properties
rheology
Rheology and viscoelasticity
Solution and gel properties
Tensors
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Summary:In this paper, the flow behavior of Leonov-Like conformational rheological model, which has root in the generalized Poisson bracket formalism based on the conformation tensor, have been studied in the circular die flow. Prediction of the normal stress differences during the flow of these fluids lets us to follow and calculate relaxation dependent phenomena such as die swell. The model predictions have been compared for the four families of mobility expressions. The Study of the model prediction sensitivity to its mobility term shows that model predictions can cover a wide range of rheological behaviors generally observed for polymer melts and solutions in the circular die flow.
ISSN:1022-1360
1521-3900
DOI:10.1002/masy.200851402