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A numerical analysis on the curved bileaflet mechanical heart valve (mhv): leaflet motion and blood flow in an elastic blood vessel

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Abstract

In blood flow passing through the mechanical heart valve (MHV) and elastic blood vessel, hemolysis and platelet activation causing thrombus formation can be seen owing to the shear stress in the blood. Also, fracture and deformation of leaflets can be observed depending on the shape and material properties of the leaflets which is opened and closed in a cycle. Hence, comprehensive study is needed on the hemodynamics which is associated with the motion of leaflet and elastic blood vessel in terms of fluid-structure interaction. In this paper, a numerical analysis has been performed for a three-dimensional pulsatile blood flow associated with the elastic blood vessel and curved bileaflet for multiple cycles in light of fluid-structure interaction. From this analysis fluttering phenomenon and rebound of the leaflet have been observed and recirculation and regurgitation have been found in the flow fields of the blood. Also, the pressure distribution and the radial displacement of the elastic blood vessel have been obtained. The motion of the leaflet and flow fields of the blood have shown similar tendency compared with the previous experiments carried out in other studies. The present study can contribute to the design methodology for the curved bileaflet mechanical heart valve. Furthermore, the proposed fluid-structure interaction method will be effectively used in various fields where the interaction between fluid flow and structure are involved.

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Abbreviations

J :

Coordinate transformation Jacobian

q :

Displacement vector

[M]:

Mass matrix

[C]:

Damping matrix

[K]:

Stiffness matrix

F :

Force vector

[IC]:

Influence coefficient

p b :

Pressure at fluid-structure boundaries

ρ :

Density

μ :

Dynamic viscosity

θ :

Leaflet opening angle

ϕ :

Rotation angle

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Authors and Affiliations

  1. Mechanical Engineering Department, Graduate School of Kyunghee University, 1 Seochon, 449-701, Kihung, Yongin, Kyunggi, Korea

    Jin Seok Bang

  2. College of Environmental Engineering, An Yang University, Anyang 5-dong, 430-714, Manan-gu, Anyang-shi, Kyunggi, Korea

    Choeng Ryul Choi

  3. College of Advanced Technology, Kyunghee University, 1 Seochon, 449-701, Kihung, Yongin, Kyunggi, Korea

    Chang Nyung Kim

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  1. Jin Seok Bang
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  2. Choeng Ryul Choi
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Correspondence to Chang Nyung Kim.

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Bang, J.S., Choi, C.R. & Kim, C.N. A numerical analysis on the curved bileaflet mechanical heart valve (mhv): leaflet motion and blood flow in an elastic blood vessel. J Mech Sci Technol 19, 1761–1772 (2005). https://doi.org/10.1007/BF02984188

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  • DOI: https://doi.org/10.1007/BF02984188

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