Modeling and Simulation of the Vessel Network Hemodynamics

Abstract

The knowledge of various hemodynamic factors in blood vessels is important for understanding mechanics, states and treatment of various vascular diseases. The objective of this research is to find the change of hemodynamic parameters for various vascular network and flow conditions. Finite-element based multiphysics software COMSOL 5.2a was used to solve Navier Stokes equation with pulsating pressure conditions in bifurcation and tortuous vessel networks. The various vessel diameters were used to accommodate the changes of diameter at different ages. The arterial wall stress, shear rate, velocity profile at the junctions, vorticity and circulation rate were calculated. The results show that microcirculation and vortices can generate even in a low velocity due in tortuous vessel and junctions where multiple vessels meet. The arterial wall shear stress and shear rate follow the pattern of pulsating pressure conditions. However, in furthest and narrow vessel from the boundary the pulsating nature become weaker. This finding will help better understanding the vascular diseases.