Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)
- Volume 1998 Issue 11
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- Pages.247-248
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- 1998
Measurement of Flow Field Downstream of Polyurethane Artificial Heart Valve with Floating Valve Leaflet
열림판이 지지대에 고정되지 않은 폴리우레탄 인공판막 하류의 유동장 측정
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Kim, J.K.
(Interdisciplinary Program in Medical and Biological Engineering Major, Graduate School, Seoul National University) ;
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Sung, J.
(Department of Mechanical Engineering, Graduate School, Seoul National University) ;
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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) ;
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Yoo, J.Y.
(Department of Mechanical Engineering, Seoul National University)
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김중경
(서울대 대학원 협동과정 의용생체공학) ;
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성재용
(서울대 대학원 기계공학과) ;
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장준근
(서울대 정밀기계설계공동연구소) ;
- 민병구 (서울대 의대 의공학교실) ;
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유정열
(서울대 기계공학과)
- Published : 1998.11.20
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.
Keywords