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Measurements of steady flow through a bileaflet mechanical heart valve using stereoscopic PIV

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Abstract

Computational modeling of bileaflet mechanical heart valve (BiMHV) flow requires experimentally validated datasets and improved knowledge of BiMHV fluid mechanics. In this study, flow was studied downstream of a model BiMHV in an axisymmetric aortic sinus using stereoscopic particle image velocimetry. The inlet flow was steady and the Reynolds number based on the aortic diameter was 7600. Results showed the out-of-plane velocity was of similar magnitude as the transverse velocity. Although additional studies are needed for confirmation, analysis of the out-of-plane velocity showed the possible presence of a four-cell streamwise vortex structure in the mean velocity field. Spatial data for all six Reynolds stress components were obtained. Reynolds normal stress profiles revealed similarities between the central jet and free jets. These findings are important to BiMHV flow modeling, though clinical relevance is limited due to the idealized conditions chosen. To this end, the dataset is publicly available for CFD validation purposes.

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Acknowledgments

This study was supported by NSERC (C.R.E., P.S.). C.H. was supported by NSERC PGS-M funding. In addition, the Canada Research Chairs Program (C.R.E.) is gratefully acknowledged.

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Authors and Affiliations

  1. Department of Mechanical and Industrial Engineering, University of Toronto, 5 King’s College Road, Toronto, ON, M5S 3G8, Canada

    Chris Hutchison & Pierre Sullivan

  2. Department of Bioengineering, Imperial College, London South Kensington Campus, London, SW7 2AZ, UK

    C. Ross Ethier

Authors
  1. Chris Hutchison
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  2. Pierre Sullivan
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  3. C. Ross Ethier
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Correspondence to Chris Hutchison.

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Hutchison, C., Sullivan, P. & Ethier, C.R. Measurements of steady flow through a bileaflet mechanical heart valve using stereoscopic PIV. Med Biol Eng Comput 49, 325–335 (2011). https://doi.org/10.1007/s11517-010-0705-z

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  • DOI: https://doi.org/10.1007/s11517-010-0705-z

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