狭窄分叉动脉非牛顿血流的壁剪应力分布

IF 0.3 Q4 MATHEMATICS Matematika Pub Date : 2023-04-15 DOI:10.11113/matematika.v39.n1.1452
Norliza Mohd Zain, Z. Ismail, Muhammad Sabaruddin Ahmad Jamali, Y. J. Lim
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引用次数: 0

摘要

局部斑块导致动脉壁狭窄,导致血流结构改变,减少到达心脏的液体流量,导致心脏病发作。狭窄的形成会影响血液流变学的正常血流动力学。为了说明健康动脉和病变动脉之间斑块的四种可能形成,考虑了不同类型狭窄的分支动脉。由于患病动脉的柔韧性较差,因此将动脉壁建模为二维刚性壁。在这个模型中,血流被假设为稳定的、层流的、不可压缩的,并被描述为一个广义幂律模型,本质上是非牛顿的。采用基于有限元法的COMSOL Multiphysics软件进行了数值模拟。仿真结果表明,分叉动脉不同类型的狭窄对速度分布和管壁剪应力有显著影响。
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Wall Shear Stress Distribution of non-Newtonian Blood Flow in Stenosed Bifurcated Artery
Localized plaque causes narrowing of the arterial wall, resulting in an alteration in the flow structure, reducing the flow of fluids reaching the heart and resulting in heart attacks. The formation of stenosis could disturb the normal hemodynamics in blood rheology. A bifurcated artery with different types of stenosis is considered in order to illustrate the four possible formations of plaque between healthy and diseased arteries. Due to the fact that a diseased artery is reported to be less compliant, the artery wall is modelled as a two-dimensional rigid wall. In this model, blood flow is assumed to be steady, laminar, incompressible, and characterized as a generalized power-law model that is non-Newtonian in nature. The numerical simulation is performed using COMSOL Multiphysics, which is based on finite element method. Based on simulation results, different types of stenosis in the bifurcated artery have a significant impact on velocity profiles and wall shear stresses.
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Matematika
Matematika MATHEMATICS-
自引率
25.00%
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0
审稿时长
24 weeks
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