Effect of the non-Newtonian nature of Blood on The stenosis development.

The effect of non-Newtonian nature of blood ow on the stenosis growth is
considered.Non-Newtonian but also Newtonian features of the blood flow are
simulated using the Lattice Boltzmann method. The development of the stenosis
is modelled using an approach which simulates its development in regions where
low wall shear stress and high Oscillatory Shear Index in Newtonian, constant
viscosity flow and time-dependent viscsosity, non-Newtonian flow. The model is
applied to investigate the average velocity gradient over a period and oscillations
of the flow, and how this changes at key times in the development of the stenosis.
Changes in the time-averaged values are considered over a period of the motion.
The stenosis formed using both the Newtonian and Non-Newtonian model
were fairly similar in terms of the final shape of the geometry; however small
differences. In both cases, TAWSS and OSI:WSS differences were observed
between the Newtonian and non-Newtonian models in terms of both the manner
in which the stenosis developed and the near-wall haemodynamics. were observed both in the final geometry and the formation. Although these variations in the quantities of measure were not large, they did indicate that including the non Newtonian nature of blood, through the Carreau-Yasuda model, does have an
influence on the modelling of the stenosis.