Paper Information

Journal:   MODARES MECHANICAL ENGINEERING   MARCH 2017 , Volume 16 , Number 12 #F0074; Page(s) 195 To 203.
 
Paper: 

NUMERICAL STUDY OF THE EFFECT OF STENOSIS ON THE HEMODYNAMIC PARAMETERS IN BRANCH OF LAD CORONARY USING 0D/3D COUPLING METHOD

 
 
Author(s):  HEIDARINEJAD GHASSEM*, BABAKHANI HAMIDREZA, ROSTAMI ALIREZA
 
* DEPARTMENT OF MECHANICAL ENGINEERING, TARBIAT MODARES UNIVERSITY, TEHRAN, IRAN
 
Abstract: 

Stenosis in coronary artery and the other cardiac diseases such as Atherosclerosis is a major cause of death worldwide. Numerical simulation of blood flow in arteries which have encountered stenosis can help medical evaluation. The purpose of this paper is to find the effect of arteries stenosis on the hemodynamic parameters by simulation of blood flow in LAD branch of coronary artery. The computational domain has been determined from CT images of human heart. In this study, blood is assumed to be homogeneous and Newtonian and the blood flow is assumed to be pulsatile. In order to reach more realistic modeling of flow and pressure, Seven–element lumped model has been used in coronary artery outlet, in other words the 0D and 3D models are coupled together. The results indicate that the calculated flow wave is the minimum in systolic phase and maximum in diastolic phase in coronary artery which is in contrast with Aorta. On the other hand, by increasing the stenosis percent from 30 to 60 percent, no significant drop of flow has been observed in the state of rest, and it has been validated with experimental results. The results indicate that with increasing stenosis, time average wall shear stress in the stenosis region increases, while it decreases before and after the stenosis. Also, the investigation of oscillating shear index indicates that in the state of 60% of stenosis and in the main downstream branch, it has the maximum value which is indicative of the presence of turbulent flow in this region.

 
Keyword(s): BLOOD, NEWTONIAN, CORONARY ARTERY, STENOSIS, HEMODYNAMIC PARAMETER
 
References: 
  • ندارد
 
  Persian Abstract Yearly Visit 29
 
Latest on Blog
Enter SID Blog