Advances on Viscoelastic Fluid Flow Simulation

Favero, Jovani L. and Secchi, Argimiro and Cardozo, Nilo and Jasak, Hrvoje (2010) Advances on Viscoelastic Fluid Flow Simulation. = Advances on Viscoelastic Fluid Flow Simulation. In: Single and Two-Phase Flows on Chemical and Biomedical Engineering. Bentham Science Publishers, Sharjah, pp. 233-265. ISBN 978-1-60805-504-3

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The increasing necessity for use of synthetic polymer products, such as for production of packaging, parts of appliances, electronics, cars, biomaterials for medical applications, etc., has led to the polymer industry to seek reduction of waste and increase product quality and productivity. Consequently, a better understanding of how the rheological properties of polymers affect their processing and final product quality is of great importance. In order to obtain faster results with less cost, the studies of modeling and simulation of polymer processing are increasing every day. This chapter aims to describe new tools for CFD simulations of viscoelastic fluids, implemented in the OpenFOAM CFD package due to advantages offered by this software, such as the possibility to use multigrid techniques and data processing parallelization, besides being a free software and open source. The constitutive models of Maxwell, UCM, Oldroyd-B, White-Metzner, Giesekus, Leonov, FENE-P, FENE-CR, linear and exponential PTT, Pom-Pom, XPP and DCPP were included in the general multimode form. In order to validate the developed solver, comparisons with numerical and experimental results from literature were carried out. The results were satisfactory giving credibility to the implemented solver and ensure the availability of a powerful tool for the study of viscoelastic fluids to be used both in academia and in industry. An extension of this tool, used for analysis of free-surface viscoelastic fluid flows using the VOF methodology, is also presented. The die swell experiment, a classical flow phenomenon used in the rheology literature to present the concept of viscoelastic effects, was also simulated. The results obtained using Giesekus model showed the great potential of the developed formulation, once all phenomena observed experimentally were reproduced in the simulations.

Item Type: Book Section
Keywords (Croatian): Viscoelastic fluids; free surface flow; two-phase flow; finite volumes; multimode simulation; die swell simulation; differential constitutive equations; high weissenberg numbers; VOF; CFD; DEVSS; OpenFOAM
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 500 Department of Energy, Power Engineering and Environment > 530 Chair of Turbomachinery
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 23 Jun 2015 09:43
Last Modified: 28 Mar 2017 09:29

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