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RISS 인기검색어
- 검색키워드
- 저자 : Bahtiyor Buriev (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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Fluid-structure interactions of physiological flow in stenosed artery
Buriev, Bahtiyor,Kim, Tae-Dong,Seo, Tae-Won The Korean Society of Rheology 2009 Korea-Australia rheology journal Vol.21 No.1
Atherosclerosis is a disease that narrows, thickens, hardens, and restructures a blood vessel due to substantial plaque deposit. The geometric models of the considered stenotic blood flow are three different types of constriction of cross-sectional area of blood vessel; 25%, 50%, and 75% of constriction. The computational model with the fluid-structure interaction is introduced to investigate the wall shear stresses, blood flow field and recirculation zone in the stenotic vessels. The velocity profile in a compliant stenotic artery with various constrictions is subjected to prescribed physiologic waveform. The computational simulations were performed, in which the physiological flow through a compliant axisymmetric stenotic blood vessel was solved using commercial software ADINA 8.4 developed by finite element method. We demonstrated comparisons of the wall shear stress with or without the fluid-structure interaction and their velocity profiles under the physiological flow condition in the compliant stenotic artery. The present results enhance our understanding of the hemodynamic characteristics in a compliant stenotic artery.
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Fluid-structure interactions of physiological flow in stenosed artery
Bahtiyor Buriev,김태동,서태원 한국유변학회 2009 Korea-Australia rheology journal Vol.21 No.1
Atherosclerosis is a disease that narrows, thickens, hardens, and restructures a blood vessel due to substantial plaque deposit. The geometric models of the considered stenotic blood flow are three different types of constriction of cross-sectional area of blood vessel; 25%, 50%, and 75% of constriction. The computational model with the fluid-structure interaction is introduced to investigate the wall shear stresses, blood flow field and recirculation zone in the stenotic vessels. The velocity profile in a compliant stenotic artery with various constrictions is subjected to prescribed physiologic waveform. The computational simulations were performed, in which the physiological flow through a compliant axisymmetric stenotic blood vessel was solved using commercial software ADINA 8.4 developed by finite element method. We demonstrated comparisons of the wall shear stress with or without the fluid-structure interaction and their velocity profiles under the physiological flow condition in the compliant stenotic artery. The present results enhance our understanding of the hemodynamic characteristics in a compliant stenotic artery.
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협착 동맥에서의 맥동 혈류 유동에 대한 수치해석적 연구
서태원(Taewon Seo),Bahtiyor Buriev 대한기계학회 2008 大韓機械學會論文集B Vol.32 No.11
In the present computational study, simple stenotic artery models using pulsatile flow condition were investigated. A 1 ㎐ 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.
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협착 동맥에서의 맥동 혈류 유동에 대한 수치해석적 연구
서태원(Taewon Seo),Bahtiyor Buriev 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
In the present computational study, the pulsatile flow in simple stenotic artery model was investigated. A 1 ㎐ non-reversing sinusoidal velocity was imposed at the flow inlet and the corresponding Womersley number based on the vessel radius is 2.75. The simulations of fluid flow with 25%, 50% and 75% stenosis respectively were carried using commercial code ADINA 8.4. As stenosis and Reynolds number increase, the maximum wall shear stress(WSS) increases while the minimum WSS decreases. It is found that the fluid mechanical disturbances due to stenosis 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.
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