Numerical Investigation on the Effects of the Pulsatile Blood Flow in a Stenosed Coronary Bypass

摘要

Coronary bypass surgery helps to feed the heart tissue with enough blood to keeps its normal performance. Due to the variations of the bypass angle as well as the level of stenosis in the coronary artery, it is needed to perform a study to understand the role of these factors on theblood flow velocity as well as the amount of shear stress around the vulnerable stenotic areas, i.e., bifurcation. Therefore, this study was aimed at performing a Three-Dimensional (3D) Fluid-Structure Interaction (FSI) numerical simulation of the pulsatile blood flow in an elastic artery.The blood was considered to be Newtonian and homogenous. The coronary bypass was connected to the main artery at the angle and stenosis of 35°, 60% and 80%, respectively. The results were then reported as the amount of the blood flow velocity as well as the shear stress in the vulnerableparts. The findings may have implications for providing an outlook for the biomechanical experts and doctors about the amount of the blood velocity and shear stress in the coronary bypass not only at an especial angle but also different stenosis angles.