Numerical and experimental simulation of transitional flow in a blood vessel junction
Numerical and experimental simulation of transitional flow in a blood vessel junction
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DOI：
10.1080/10407780600710375
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发表时间：
2007-01-01
影响因子：
2
通讯作者：
Bassiouny, Hisham S.
中科院分区：
文献类型：
--
作者：
Lee, Sang-Wook;Smith, David S.;Bassiouny, Hisham S.
通过直接数值模拟和实验技术检查特定受试者动静脉移植物内的过渡流。在雷诺数为1,200时，采用谱元法进行了模拟，并在牛顿流体假设下采用了两种不同的流动分区。采用激光多普勒风速仪对具有相同几何形状的光学透明刚性模型进行了实验测量。两个流动部门的时间平均和波动速度观察到良好的协议。流场的特征是沿着底板的高速射流、流动分离和通常复杂的三维流型。这些结果是新颖的，因为它们代表了实验和数值模拟之间的第一个详细的比较过渡流内的受试者特定的血管交界处。
Transitional flow within a subject-specific arteriovenous graft is examined through direct numerical simulation and experimental techniques. Simulations employing the spectral element method are conducted at Reynolds number 1,200 with two different flow divisions under a Newtonian fluid assumption. Laser Doppler anemometry is used to experimentally measure velocity in an optically clear rigid model with the same geometry. Good agreement is observed for both flow divisions with respect to time-averaged and fluctuating velocity. The flow field is characterized by a high-speed jet along the floor, flow separation, and a generally complex three-dimensional flow pattern. These results are novel in that they represent the first detailed comparison between experiments and numerical simulations for transitional flow within a subject-specific blood vessel junction.