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Computational Vision and Medical Image Processing pp 265–279Cite as

Flow of a Blood Analogue Solution Through Microfabricated Hyperbolic Contractions

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Part of the book series: Computational Methods in Applied Sciences ((COMPUTMETHODS,volume 19))

Abstract

The flow of a blood analogue solution past a microfabricated hyperbolic contraction followed by an abrupt expansion was investigated experimentally. The shape of the contraction was designed in order to impose a nearly constant strain rate to the fluid along the centerline of the microgeometry. The flow patterns of the blood analogue solution and of a Newtonian reference fluid (deionized water), captured using streak line imaging, are quite distinct and illustrate the complex behavior of the blood analogue solution flowing through the microgeometry. The flow of the blood analogue solution shows elastic-driven effects with vortical structures emerging upstream of the contraction, which are absent in Newtonian fluid flow. In both cases the flow also develops instabilities downstream of the expansion but these are inertia driven. Therefore, for the blood analogue solution at high flow rates the competing effects of inertia and elasticity lead to complex flow patterns and unstable flow develops.

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Acknowledgements

The authors gratefully acknowledge funding by FCT via projects PTDC/EQU-FTT/71800/2006, REEQ/262/EME/2005, REEQ/928/EME/2005, PTDC/EME-MFE/099109/2008 and PTDC/EQU-FTT/70727/2006. In addition, PCS and ISP acknowledge the financial support of scholarships SFRH/BD/28846/2006 and CEFT/BII/2008/01.

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Authors and Affiliations

  1. Departamento de Engenharia Química, Centro de Estudos de Fenómenos de Transporte, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200–465, Porto, Portugal

    P. C. Sousa, I. S. Pinho, M. S. N. Oliveira & M. A. Alves

  2. Centro de Estudos de Fenómenos de Transporte, Departamento de Engenharia Mecânica, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200–465, Porto, Portugal

    F. T. Pinho

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  1. P. C. Sousa
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  2. I. S. Pinho
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  3. F. T. Pinho
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  4. M. S. N. Oliveira
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  5. M. A. Alves
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Corresponding author

Correspondence to M. S. N. Oliveira .

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Editors and Affiliations

  1. Fac. Engenharia, Lab. Engenharia de Processos,, Universidade do Porto, Rua Dr. Roberto Frias, Porto, 4200-465, Portugal

    João Manuel R. S. Tavares

  2. Fac. Engenharia, Lab. Engenharia de Processos,, Universidade do Porto, Rua Dr. Roberto Frias, Porto, 4200-465, Portugal

    R. M. Natal Jorge

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Sousa, P.C., Pinho, I.S., Pinho, F.T., Oliveira, M.S.N., Alves, M.A. (2011). Flow of a Blood Analogue Solution Through Microfabricated Hyperbolic Contractions. In: Tavares, J., Jorge, R. (eds) Computational Vision and Medical Image Processing. Computational Methods in Applied Sciences, vol 19. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0011-6_15

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  • DOI: https://doi.org/10.1007/978-94-007-0011-6_15

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  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-007-0010-9

  • Online ISBN: 978-94-007-0011-6

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