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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Numerical study of blood flow through different double bell-shaped stenosed coronary artery during the progression of the disease, atherosclerosis
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Numerical study of blood flow through different double bell-shaped stenosed coronary artery during the progression of the disease, atherosclerosis

机译：疾病，动脉粥样硬化进展过程中流经不同双钟形狭窄冠状动脉的血流的数值研究

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Purpose - This paper aims to perform numerical simulations through different shaped double stenoses in a vascular tube for a better understanding of arterial blood flow patterns, and their possible role during the progression of atherosclerosis. The dynamics of flow features have been studied by wall pressure, streamline contour and wall shear stress distributions for all models. Design/methodology/approach - A finite volume method has been employed to solve the governing equations for the two-dimensional, steady, laminar flow of an incompressible and Newtonian fluid. Findings - The paper finds that impact of pressure drop, reattachment length and peak wall shear stress at each restriction primarily depends upon percentage of restriction, if restriction spacing is sufficient. The quantum of impact of pressure drop, reattachment length and peak wall shear stress is much effected for smaller restriction spacing. If recirculating bubble of first restriction merges with the recirculating bubble formed behind the second restriction in this smaller restriction spacing; The similar effect of smaller restriction spacing is observed, if Reynolds number increases also. Originality/value - The effect of different shaped stenoses, restriction spacing and Reynolds number on the flow characteristics has been investigated and the role of all the flow characteristics on the progression of the disease, atherosclerosis, is discussed.
机译：目的-本文旨在通过血管管中不同形状的双狭窄进行数值模拟，以更好地了解动脉血流模式及其在动脉粥样硬化进展中的可能作用。通过所有模型的壁面压力，流线轮廓和壁面剪应力分布研究了流动特征的动力学。设计/方法/方法-已采用有限体积方法来求解不可压缩牛顿流体的二维，稳定，层流的控制方程。研究结果-本文发现，如果限制间距足够大，则每个限制处的压降，重新连接长度和峰值壁切应力的影响主要取决于限制的百分比。对于较小的限制间距，压降，重新连接长度和峰值壁剪应力的影响量受到很大影响。如果第一限制器的再循环气泡与第二限制器后面形成的再循环气泡以较小的限制间隔合并；如果雷诺数也增加，则观察到较小的限制间距的类似效果。独创性/价值-研究了不同形状的狭窄，限制间距和雷诺数对血流特性的影响，并讨论了所有血流特性对疾病进展（动脉粥样硬化）的作用。

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