On the rheology of immiscible blends

We propose a family of new models making a direct link between flow and structure for immiscible mixtures of viscoelastic fluids undergoing high deformation flows. The morphology is treated both at local (Doi-Ohta-type) and more macroscopic (droplet-like) scales. The governing equations, that includ...

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Bibliographic Details
Published in:Rheologica acta 2001-11, Vol.40 (6), p.560-569
Main Authors: GRMELA, Miroslav, BOUSMINA, Mosto, PALIERNE, Jean-Francois
Format: Article
Language:English
Subjects:
Applied sciences
Computational fluid dynamics
Conservation laws
Deformation
Exact sciences and technology
Free energy
Mathematical analysis
Mathematical models
Miscibility
Morphology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Rheological properties
Rheology
Rheology and viscoelasticity
Tensors
Viscoelastic fluids
Viscoelasticity
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Summary:We propose a family of new models making a direct link between flow and structure for immiscible mixtures of viscoelastic fluids undergoing high deformation flows. The morphology is treated both at local (Doi-Ohta-type) and more macroscopic (droplet-like) scales. The governing equations, that include expressions for the extra stress tensor, agree with the conservation laws and with the observed compatibility with thermodynamics. In the particular case in which only one of the two characterizations of the morphology is used, extended versions of the Doi-Ohta and the Maffettone and Minale models are obtained. The extension consists of involving explicitly the free energy in the governing equations and completing the expressions for the extra stress tensor.
ISSN:0035-4511
1435-1528
DOI:10.1007/s003970100188