Abstract
NUMERICAL INVESTIGATION OF BLOOD FLOW THROUGH STENOTIC ARTERY
Mohammed Nasir Uddin* and M. A. Alim
ABSTRACT
The aim of this paper is to investigate the significance of stenosis effects on blood flow and measures the non-Newtonian characteristics of blood flow in blood vessels. At present work, the models are studied for the Newtonian and Non-Newtonian models as well as their generalized modifications. The governing system of equations is based on incompressible Navier-Stokes equations which are generalized to consider viscoelasticity and shear-thinning properties of blood flow. The numerical solution of the system of governing equations is obtained by Finite element method. Mathematical tests are performed on an idealized stenosis and a realistic stenosed carotid bifurcation reconstructed from medical images. Model sensitivity tests are achieved with respect to the characteristic flow rate to evaluate its impact on the observed non-Newtonian effects. The numerical simulation is performed for various dimensionless numbers (Reynold numbers, Re=1-1050 and Weissenberg numbers, Wi= 0-1.0) at flow rates 0.5 cm3/s with good convergence of the iterative scheme. The blood flow simulations indicate that non-Newtonian behavior has considerable effects on instantaneous flow patterns. The blood flow patterns are shown in terms of velocity and pressure contour line. Various effects for these models are presented graphically.
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