复杂血管内两相流数值模拟

为了更全面的了解复杂血管内部流动状况,采用液固两相流模型和脉动速度入口条件,对分叉弯曲复杂血管内部两相流动进行模拟分析。通过对其压力、速度、流线、壁面剪切应力、红细胞体积浓度分布等流动参数分析,发现在血管弯曲和分叉区域,血液流动复杂,容易产生低速回流区或二次回流,而且剪切应力较低,红细胞体积浓度较高。

Numerical simulation of two phase flow inside the complicated vessel

In order to more fully understand the complex flow conditions inside the blood vessels,the liquid-solid two-phase flow model and the pulsating velocity inlet conditions are used to analyze the internal two-phase flow situation of complicated bending bifurcation vascular. By flow parameter analysis of its pressure,speed,streamlines,the wall shear stress,volume density distribution of red blood cell,in the zone of bending and bifurcation,the flow field is complicated,and prone to produce the recirculation zone with low speed,or secondary flow,and low shear stress,led to high volume concentrations of red blood cell.