Please use this identifier to cite or link to this item: https://hdl.handle.net/10216/93563
Author(s): F. L. Keegan
M. P. Escudier
M. A. Alves
R. J. Poole
Title: Viscoelastic flow through gradual contractions: Experiments and simulations
Issue Date: 2008
Abstract: This paper reports the results of an experimental investigation into the flow of aqueous solutions of apolyacrylamide at three concentrations through a curved gradual planar contraction with a contraction ratio of 8:1. Pooleet al. (R.J. Poole et al (2005) Proc. R. Soc. London A vol. 461) have previously observed large velocity overshoots nearto the sidewalls of a gradual contraction while investigating the flow of a viscoelastic shear-thinning fluid through asudden expansion preceded by a smooth gradual contraction. These overshoots were termed 'cat's ears' due to theirappearance. Experimental results are presented here that conflrm the occurrence of these overshoots within thecontraction section without the presence of a sudden expansion at its outlet. Preliminary numerical results that exhibitqualitative agreement with the experimental results are also presented.
Subject: Ciências da engenharia e tecnologias
Engineering and technology
Scientific areas: Ciências da engenharia e tecnologias
Engineering and technology
URI: https://repositorio-aberto.up.pt/handle/10216/93563
Source: Proceedings of the XVth International Congress of Rheology
Document Type: Artigo em Livro de Atas de Conferência Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Livro de Atas de Conferência Internacional

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