弹性动脉狭窄血管内血液流动的ALE方法分析

针对弹性动脉狭窄血管中血液的流动状况,采用任意拉格朗日-欧拉方法(ALE),在给定相同的边界条件下模拟出了弹性血管和刚性血管中血流速度和压力的变化情况,分析了不同狭窄程度模型的血流状态.结果表明:随着动脉的狭窄程度增加,其中心流速越来越大,窄前压力逐渐升高,窄后压力逐渐降低,狭窄前后的压差单调增加;刚性血管无法对人体正常生理状态进行比较好的模拟,其计算所得结论与实际情况差距较大.说明ALE方法对血液流动的数值研究是可行的.

Arbitrary Lagrangian-Eulerian Method Analysis of Blood Flow in Stenotic Elastic Arteries

By means of ALE method,we simulated two-dimensional blood flow through a stenotic elastic artery and the blood flow through a stenotic rigid artery under the same confine condition.Simulation results showed that the central velocity was increased with the increasing degree of stenosis.The pressure at the upstream of the stenosis increased and that at the downstream of the stenosis decreased,so that there was an increasing pressure difference between upstream and downstream of the stenotic site.The simulatio...