不同边界条件下动脉血流数值研究

为了对不同边界条件下动脉血流进行数值计算和比较,分析了血流动力学中边界条件的选取,从而给出了定解条件.在此基础上选用胸主动脉血管参数,采用不同入口和出口边界条件分别对定常流和非定常流进行数值计算.结果表明:在定常流下压力分布均匀,抛物面形状的速度逐渐被拉平;在非定常流下压力波形逐渐由入口波形向出口波形进行转换,速度分布平钝.边界条件对流场分布有重要影响.

Numerical Investigation of Blood Flow in Arteries Under Different Boundary Conditions

To numerically investigate and compare blood flow in arteries under different boundary conditions, the selection of boundary conditions in hemodynamics was analyzed,and then the certain solution conditions were presented.On the basis,the parameters of thoracic aorta were employed,and numerical calculations of steady and unsteady flows were performed under different inlet and outlet conditions respectively.The results show that the pressure distributions are uniform and the parabolic velocity profile is grad...