The Numerical Investigation of Blood Viscosity and Arterial Stenosis Characteristics on the Flow Behavior

Abstract

This research article presents the effect of blood viscosity and flow cross-sectional area on the behaviors of intra-arterial blood flow and mechanical behavior on blood vessels by using numerical method. The effect of arterial cross section area at 50%, 30% and 15% on the Newtonian blood flow were considered. In addition, the effect of blood viscosity variation, which in diabetics and in normal, on the flow behavior were also compared. The parameters such as velocity, pressure and shear rate within the arteries were studied. As considering the shear rate inside the arteries before stenosis, the results showed that the decrease of the flow cross-sectional area from 50% to 15% resulted in the likelihood of clogged arteries 20% increase, and the pressure was also raised 4 times. For the mathematical model validation, the velocity field and flow pattern in the bypassed arteries from the previous researches and from this research were examined. It was found that both numerical results and the flow behavior were adjacent and consistent.