Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Measurement of Flow Field Downstream of Polyurethane Artificial Heart Valve with Floating Valve Leaflet

열림판이 지지대에 고정되지 않은 폴리우레탄 인공판막 하류의 유동장 측정

  • Kim, J.K. (Interdisciplinary Program in Medical and Biological Engineering Major, Graduate School, Seoul National University) ;
  • Sung, J. (Department of Mechanical Engineering, Graduate School, Seoul National University) ;
  • Chang, J.K. (Institute of Advanced Machinery and Design, Seoul National University) ;
  • Min, B.G. (Department of Biomedical Engineering, College of Medicine, Seoul National University) ;
  • Yoo, J.Y. (Department of Mechanical Engineering, Seoul National University)
  • 김중경 (서울대 대학원 협동과정 의용생체공학) ;
  • 성재용 (서울대 대학원 기계공학과) ;
  • 장준근 (서울대 정밀기계설계공동연구소) ;
  • 민병구 (서울대 의대 의공학교실) ;
  • 유정열 (서울대 기계공학과)
  • Published : 1998.11.20
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Abstract

The effect of unattached valve leaflet on flow field downstream of a floating and flapping polyurethane heart valve prosthesis was investigated. With a triggering system and a time-delay circuit the instantaneous velocity field downstream of the valve was measured by particle image velocimetry (PIV) in conjunction with the opening posture of a flexible valve leaflet during a cardiac cycle. Reynolds shear stress distribution was calculated from the velocity fields and wall shear stress was directly measured by hot-film anemometry (HFA). The floating motion of the valve leaflet resulted in the reduction of pressure drop and recirculating flow region downstream of the valve.

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