ALE FINITE ELEMENT ANALYSIS OF THE OPENING AND CLOSING PROCESS OF THE ARTIFICIAL MECHANICAL VALVE

Applied Mathematics and Mechanics (English Edition) ›› 1996, Vol. 17 ›› Issue (5): 403-412.

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ALE FINITE ELEMENT ANALYSIS OF THE OPENING AND CLOSING PROCESS OF THE ARTIFICIAL MECHANICAL VALVE

Zhang Jianhai¹, Chen Dapeng¹, Zou Shengquan²

1. Institute of Computational Engineering Science, Southwest Jiaotong University, Chengdu 610031, P, R. China;
2. Department of Engineering Mechanics, Sichuan Union University, Chengdu 610065, P. R. China

Received:1995-05-31 Online:1996-05-18 Published:1996-05-18
Supported by:
This research is supported by the National Natural Science Foundation and the Doctoral Foundation of China

Abstract

Abstract: Employing arbitrary Lagrangian-Eulerian (ALE) finite element method, this poper studies the opening and closing process of a St. Jude medical valve through a two-dimensional model of the mechanical valve-blood interaction in which the valve is regarded as a rigid body rotating around a fixed point, and foe blood is simplified as viscous incompressible Newtonian fluid. The numerical analysis of the opening and closing behaviour of as St. Jude valve suggested that: 1. The whole opening and closing process of an artificial mechanical valve is consisted of four phases: (1) Opening phase; (2) Opening maintenance phase; (3) Closing phase; (4) Closing maintenance phase. 2. The St. Jude medical valve closes with prominent regurgitat which results in water-hammer effect. 3. During the opening and closing process of the St. Jude valve,high shear stresses occur in the middle region of the two leaflets and on the valve ring. The present model has made a breakthrough on the coupling computational analysis considering the interactive movement of the valve and blood.

Zhang Jianhai;Chen Dapeng;Zou Shengquan. ALE FINITE ELEMENT ANALYSIS OF THE OPENING AND CLOSING PROCESS OF THE ARTIFICIAL MECHANICAL VALVE. Applied Mathematics and Mechanics (English Edition), 1996, 17(5): 403-412.

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ALE FINITE ELEMENT ANALYSIS OF THE OPENING AND CLOSING PROCESS OF THE ARTIFICIAL MECHANICAL VALVE

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