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http://dx.doi.org/10.3795/KSME-B.2008.32.11.891

Numerical Study of Pulsatile Blood Flow in Stenotic Artery  

Seo, Tae-Won (국립안동대학교 기계공학부)
Buriev, Bahtiyor (국립안동대학교 대학원 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.32, no.11, 2008 , pp. 891-896 More about this Journal
Abstract
In the present computational study, simple stenotic artery models using pulsatile flow condition were investigated. A 1 Hz non-reversing sinusoidal velocity for pulsatile flow was imposed at the flow inlet and the corresponding Womersley number based on the vessel radius is 2.75. The simple stenotic geometries have been used that consist of 25%, 50% and 75% semicircular constriction in a cylindrical tube. In this paper, numerical solutions are presented for a first harmonic oscillatory flow using commercial software ADINA 8.4. As stenosis and Reynolds number increase, the maximum wall shear stress(WSS) increases while the minimum WSS decreases. As the stenotic rate increases, the pressure drop at the throat severely decreases to collapse the artery and plaque. It is found that the fluid mechanical disturbances due to the constriction were highly sensitive with rate of stenosis and Reynolds number. When Reynolds number and stenosis increase, the larger recirculation region exists. In this recirculation region the possibility of plaque attachment is increasingly higher. The present results enhance our understanding of the hemodynamics of a stenotic artery.
Keywords
Pulsatile Flow; Stenotic Artery; Wall Shear Stress; Recirculation; Reattachment;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By SCOPUS : 1
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