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Modeling of Viscoelastic Fluid Flow Behavior in the Circular Die Using the Leonov‐Like Conformational Rheological Constitutive Equations
Author(s) -
Ramazani S.A A.,
Kanvisi M.
Publication year - 2008
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200851402
Subject(s) - rheology , viscoelasticity , constitutive equation , materials science , flow (mathematics) , mechanics , thermodynamics , physics , composite material , finite element method
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.