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本文用有限元法计算了颈动脉分叉处的二维脉动流,假设壁面为刚性,但考虑了入口端雷诺数随时间而脉动的真实变化。求得了细微的速度剖面、压力分布和流线形状,并采用了一个事前已验证为正确的动脉硬化斑块形成模型(当壁面切应力小于某一阈值时斑块开始生长)。所算得的速度剖面与测量值符合得很好,而所推断的斑块形成区域与血管造影图所示相当一致。易形成斑块而引起粥样硬化损伤的区
In this paper, the two-dimensional pulsatile flow at the bifurcation of the carotid artery is calculated by the finite element method, assuming that the wall is rigid, but considering the real changes of the Reynolds number at the inlet with time pulsation. Subtle velocity profiles, pressure distributions and streamline shapes were obtained and a previously validated model of atherosclerotic plaque was established (the plaque began to grow when the wall shear stress was less than a certain threshold). The computed velocity profile is in good agreement with the measurements, and the extrapolated plaque formation area is fairly consistent with the angiogram. Easy to form plaque and cause atherosclerotic injury zone