狭窄程度对锥缩血管中脉动流的影响(英文)

Effects of Stenosis Severity on Pulsating Flow in a Tapered Artery

建立了一个轴对称的狭窄锥缩刚性动脉模型.利用不可压缩的N-S方程作为计算的理论基础,采用有限差分方案进行数值分析.提供了3种狭窄程度下的管壁切应力分布曲线并进行了分析和比较,同时给出了模型M3(h R0=1 3)在一个流动周期内的流线图.结果显示狭窄附近的流场受到了干扰,特别是狭窄的喉部及其下游区域的流场,并且狭窄程度越严重,狭窄对流场的影响就越大.

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/R0 = 1/4,1/3,1/2） are provided and discussd. The stream function contour with h/R0 = 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.