EFFECf OF TI-IENON-NEWTONIAN VISCOSITY OF BLOOD ON STEADY AND PULSATILE FLOW IN STENOSED ARTERIES
نویسنده
چکیده
The effect of non-Newtonian viscosity of blood on the steady and pulsatile flow in a straight rabbit femoral artery with various degrees of stenosis is investigated numerically using a finite element technique for the peak Reynolds numbers of 65 and 100. The Cross model is used to take into account the non-Newtonian viscosity of blood at various shear rates. The infiniteand zeroshear-rate viscosities are considered to be 0.0345 and 0.56 poise respectively. A physiological pulsatile flow wave form observed in a rabbit artery with a heart rate of 222 beats/min is used in the current numerical simulation. For steady Newtonian and non-Newtonian flows, the percentage of area constriction due to stenosis is varied from 43% to 81%, whereas for pulsatile flows the study is performed in stenosis with the area constriction ratio of 65%. The magnitude of flow separation and reanachment and the variation of shear stress due to the stenosis are investigated.
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