Duncan D D, Bargeron C B, Borchardt S E, Deters O J, Gearhart S A, Mark F F, Friedman M H
Johns Hopkins University, Applied Physics Laboratory, Laurel, Md 20707-6099.
J Biomech Eng. 1990 May;112(2):183-8. doi: 10.1115/1.2891170.
Rigid and compliant casts of a human aortic bifurcation were subjected to physiologically realistic pulsatile fluid flows. At a number of sites near the wall in the approximate median plane of the bifurcation of these models, fluid velocity was measured with a laser Doppler velocimeter, and wall motion (in the case of the compliant cast) was determined with a Reticon linescan camera. The velocity and wall motion data were combined to estimate the instantaneous shear rates at the cast wall. Analysis showed that at the outer walls the cast compliance reduced shear rates, while at the walls of the flow divider the shear rate was increased.
对人体主动脉分叉处的刚性和柔性铸型施加符合生理实际的脉动流体流动。在这些模型分叉处近似中平面的壁面附近的多个位置，用激光多普勒测速仪测量流体速度，并用Reticon线扫描相机确定柔性铸型的壁面运动。将速度和壁面运动数据结合起来，以估计铸型壁面处的瞬时剪切速率。分析表明，在外壁处，铸型的柔性降低了剪切速率，而在分流器壁面处，剪切速率增加。
