A comparison of Newtonian and non-Newtonian models for pulsatile blood flow simulations

Journal of the Mechanical Behavior of Materials

Husain Iqbal¹  Langdon Chris¹  Schwark Justin¹  Labropulu Fotini¹ 

[1] Department of Mathematics, Luther College, University of Regina, Regina, Saskatchewan, Canada S4S 0A2;

关键词: aneurysm;    blood;    fluid flows;    non-newtonian;    pulsatile;    simulations;    stenosis;   

DOI  :  10.1515/jmbm-2013-0001

来源: DOAJ

【 摘 要 】

Mathematical modeling of blood flows in the arteries is an important and challenging problem. This study compares several non-Newtonian blood models with the Newtonian model in simulating pulsatile blood flow through two three-dimensional models of an arterial stenosis and an aneurysm. Four non-Newtonian blood models, namely the Power Law, the Casson, the Carreau, and the Generalized Power Law, as well as the Newtonian model of blood viscosity, are used to investigate the flow effects induced by these different blood constitutive equations. The aim of this study is three-fold: firstly, to investigate the variation in wall shear stress in an artery with a stenosis or aneurysm at different flow rates and degrees of severity; secondly, to compare the various blood models and hence quantify the differences between the models and judge their significance; and lastly, to determine whether the use of the Newtonian blood model is appropriate over a wide range of shear rates.

【 授权许可】

Unknown