Blood Flow Modeling in Stenosed Arteries Using CFD Solver

Simulation of blood flow in arteries is an extensive topic of research to study various hemodynamic factors in CFD. This paper studies two different degrees of stenosis (less than 50 and 80% by flow area) that have been extracted from real images. The pulsatile nature of the blood flow has been considered. Changes in velocity flow patterns and wall shear stress for the two cases have been studied. Results show that the peak velocity increases drastically as the stenosis area increases to 80%. Negative velocity near the walls of the artery shows flow separation. This value also increases with the increase in stenosis area. This is seen in almost all regions of the cardiac cycle except in the accelerating flow region. With the increase in stenosis area, wall shear stress (WSS) rises drastically. Negative wall shear stress seen downstream of stenosis also indicates recirculation.