keywords: Blood flow, blood viscosity, stenosis, wall shear stress
This paper considers the effect of multiple stenosis on blood flow in human arteries taking blood as non-Newtonian fluid. Constraints of blood flow in human arteries are known as stenosis which normally ends up into hypertension/stroke and heart failure. Also the deposits of cholesterol on the arterial wall and proliferation of connective tissues are responsible for the abnormal growth in the lumen of an artery. The expressions for the flow characteristics, the pressure gradient, wall shear stress, velocity and volumetric flow rate are obtained in the course of this study. Observations revealed that: as Hematocrit and Viscosity increases, the arterial wall shear stress decreases which indicates increase in human heart pressure. However, increase in Hematocrit (H) and the length of the artery is inversely proportional to the arterial wall shear stress, this signifies the damage of veins around the arteries. The blood pressure gradient increase which is directly proportional to the length of the artery and Hematocrit, this suggests clotting of blood in human heart which can lead to death.