THE ABDOMINAL AORTA BIFURCATION WITH ILIAC ARTERIES: THE WALL ELASTICITY EFFECT ON THE FLOW STRUCTURE

For the first time, a numerical study of the effect of vascular elasticity on blood flow has been carried out using a model of the abdominal aorta bifurcation with iliac arteries of the average statistical geometry. The greatest effect of elasticity was shown to be observed in the abdominal aorta before bifurcation where an initial oval cross-section shaping into a circle. Taking into account the elasticity of the walls, the flow structure remained unchanged, but the maximum flow rate increased by 40 % in the abdominal aorta. In the abdominal-aortic bifurcation region the cycle-averaged shear stresses decreased by 20 %, and their oscillation index increased by 60 %.