A comparison between non-Newtonian and Newtonian blood viscosity models

Abstract

In this study the effects of some non-Newtonian viscosity and Newtonian viscosity models on the Wall Shear Stress and velocity distributions in carotid artery are investigated. Three distinct non-Newtonian viscosity models named Carreua, Casson and Generalised Power Method and Newtonian model are employed in the simulations. 3D Navier–Stokes equations is solved numerically on anatomically realistic geometry which is obtained from CT data. At the inlet of the numerical model experimental flow data which is measured at a real common carotid artery is imposed. The WSS and velocity distributions which are calculated using different viscosity models are compared. Results show that the differences between non-Newtonian models and Newtonian model are important at the regions having low velocity.