Effects of Stenosis Severity on Pulsating Flow in a Tapered Artery

A mathematical model of pulsating flow in a tapered rigid artery with an axially symmetric stenosis is established. The incompressible Navier-Stokes equation for the flow field is solved numerically and a finite difference scheme is used to implement the numerical calculation. The distributions of the wall shear stress with three stenosis severity(h/R0=1/4,1/3,1/2) are provided and discussd.The stream function contour with h/R0=1/3 is given. The result shows that the stenosis disturbs the flow flied in the vicinity of the stenosis, especially at the throat and in the downstream.