Nakamura M, Sugiyama W, Haruna M
Akita University, Japan.
J Biomech Eng. 1993 Nov;115(4A):412-7. doi: 10.1115/1.2895505.
An experiment on the fully developed sinusoidal pulsatile flow at transitional Reynolds numbers was performed to evaluate the basic characteristics of the wall shear stress. In this experiment, the wall shear stress was calculated from the measured section averaged axial velocity and the pressure gradient by using the section averaged Navier-Stokes equation. The experimental results showed that the ratio of the amplitude of the wall shear stress to the amplitude of the pressure gradient had the maximum value when the time averaged Reynolds number was about 4000 and the Womersley number was about 10. As this condition is close to the blood flow condition in the human aorta, it is suggested that the parameter of the aorta has an effect to increase the amplitude of the wall shear stress acting on the arterial wall.
进行了一项关于过渡雷诺数下充分发展的正弦脉动流的实验，以评估壁面剪应力的基本特性。在该实验中，通过使用截面平均的纳维-斯托克斯方程，根据测量得到的截面平均轴向速度和压力梯度来计算壁面剪应力。实验结果表明，当时间平均雷诺数约为4000且沃默斯利数约为10时，壁面剪应力幅值与压力梯度幅值之比具有最大值。由于该条件接近人体主动脉中的血流条件，因此表明主动脉的参数对增加作用于动脉壁的壁面剪应力幅值有影响。
