Perktold K, Gruber K, Kenner T, Florian H
Basic Res Cardiol. 1984 May-Jun;79(3):253-61. doi: 10.1007/BF01908024.
The velocity field and the wall shear stress have been calculated numerically by the finite element method to the time-dependent Navier-Stokes equations for pulsatile flow in a model of an aneurysm. The results show a complex flow field with two eddies growing and disappearing during the cardiac cycle. Downstream at the outlet vessel high wall shear stress occurs, which may lead to a downstream-growing of the aneurysm. With the knowledge of a sufficiently accurate flow field, the calculation of several particle paths has been carried out. Starting points and starting time are varied. The paths demonstrate the time-dependent development, shift and disappearance of vortices during the pulsatile cycle and provide hints on zones of stasis. These are significant factors in thrombogenesis.
通过有限元方法对动脉瘤模型中脉动流的时间相关纳维-斯托克斯方程进行了数值计算，得出了速度场和壁面剪应力。结果显示了一个复杂的流场，在心动周期中有两个涡流生长和消失。在出口血管下游出现高壁面剪应力，这可能导致动脉瘤向下游生长。在已知足够精确的流场的情况下，进行了几条粒子路径的计算。起点和起始时间是变化的。这些路径展示了脉动周期中涡流随时间的发展、移动和消失，并提供了关于停滞区域的线索。这些是血栓形成的重要因素。
