摘要
本文以探索发生了粥样硬化病变的动脉血管中的血液流动规律为背景,利用流动可视化技术,从流体力学角度定性研究了局部狭窄刚性管中的振荡流场。发现振荡流场有其独特的特点,其旋涡要强于相应的定常流场,雷诺数、Womersley 数以及管子狭窄形状都对流场有较大影响。该项研究对于认识狭窄管中粘性流场特性,建立相应的物理、数学模型、以及发展流动可视化技术都十分有意义。
This paper is on the background of blood flow in asegment of an atherosclerotic artery.By using the flow-visualization tech-nique,the oscillating viscous flow field in localized narrowing tubes hasbeen researched qualitatively in the view of fluid mechanics.It is foundthat the oscillating flow has its own regularity and the vortices arestronger than those in the corresponding steady flow field.Reynoldsnumber,Womersley number and shapes of tubes all affect flow field.The flow visualization observations are important to understand thefluid mechanics characteristics of the oscillating viscous flow in narro-wing tubes,and have been of value in conducting further quantitativephysical and mathematical models.
关键词
流动可视机
振荡
流动
旋涡
flow-visualization
oscillating flow
vortex
localized narrowing tube
