Flow dynamics and wall shear-stress variation in a fusiform aneurysm

被引：0
作者：
Gregory J. Sheard
机构：
[1] Monash University,Division of Biological Engineering, Faculty of Engineering
[2] Monash University,Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Department of Mechanical and Aerospace Engineering
来源：
Journal of Engineering Mathematics | 2009年 / 64卷
关键词：
Aneurysm; Blood flow; Computational fluid dynamics; Direct numerical simulation; Spectral-element method; Wall shear stress;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Pulsatile flow through a tube featuring a sinusoidal bulge is computed in order to determine the flow dynamics and wall shear-stress conditions encountered under conditions representative of blood flow through a human abdominal aortic aneurysm. A high-order spectral-element algorithm is employed to accurately determine velocity and vorticity fields, plus wall shear stresses, which are notoriously difficult to measure experimentally. A greater level of detail in the flow is revealed when compared to recent particle image velocimetry experiments. For both the mean and standard deviation of wall shear stress, minimum levels are found at the widest point of the aneurysm bulge, and maximum levels are recorded in the distal (downstream) region of the bulge. In an aneurysm with length and maximum diameter 2.9 and 1.9 times the artery diameter, respectively, peak instantaneous wall shear stress is 2.4 times greater than the peak wall shear stress recorded in a healthy vessel.
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页码：379 / 390
页数：11
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