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Author(s): P. C. Sousa
I. S. Pinho
F. T. Pinho
M. S. N. Oliveira
M. A. Alves
Title: Flow of a blood analogue solution through microfabricated hyperbolic contractions
Issue Date: 2009
Abstract: In this work, the flow of a blood analogue solution past a microfabricated hyperbolic contractionfollowed by an abrupt expansion was studied. The shape of the contraction was selected in order to providea nearly constant acceleration of the fluid at the centerline of the microgeometry. The flow patterns of theblood analogue solution and of a Newtonian reference fluid were captured using streak line imaging. Theflow visualization results illustrate the complex behavior of the blood analogue solution flowing through themicrogeometry, which is distinct of that observed for Newtonian fluid flow. For the blood analogue solution,elastic-driven effects are observed with vortical structures emerging upstream of the contraction, which areabsent in Newtonian fluid flow. In this latter case the flow also develops inertia-driven instabilities downstreamof the expansion. In addition, for the blood analogue solution at high flow rates the competing effectsof inertia and elasticity lead to complex flow patterns and unstable flow develops
Subject: Outras ciências da engenharia e tecnologias
Other engineering and technologies
Scientific areas: Ciências da engenharia e tecnologias::Outras ciências da engenharia e tecnologias
Engineering and technology::Other engineering and technologies
Source: VipIMAGE 2009 - II ECCOMAS Thematic Conference on Computational Vision and Medical Image Processing
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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