A 3-D numerical simulation of non-Newtonian blood flow through femoral artery bifurcation with a moderate arteriosclerosis: investigating Newtonian/non-Newtonian flow and its effects on elastic vessel walls

被引:43
作者
Amiri, Mohammad Hassan [1 ]
Keshavarzi, Ahmad [1 ]
Karimipour, Arash [2 ]
Bahiraei, Mehdi [3 ]
Goodarzi, Marjan [4 ]
Esfahani, J. A. [5 ]
机构
[1] Islamic Azad Univ, Dept Mech Engn, Khomeinishahr Branch, Khomeinishahr, Iran
[2] Islamic Azad Univ, Dept Mech Engn, Najafabad Branch, Najafabad, Iran
[3] Kermanshah Univ Technol, Dept Mech Engn, Kermanshah, Iran
[4] Ton Duc Thang Univ, Fac Environm & Labour Safety, Sustainable Management Nat Resources & Environm R, Ho Chi Minh City, Vietnam
[5] Ferdowsi Univ Mashhad, Fac Engn, Dept Mech Engn, POB 91775-1111, Mashhad, Razavi Khorasan, Iran
关键词
Computerized tomography - Hemodynamics - Shear flow - Fluid structure interaction - Shear stress - Blood - Blood vessels - Computational geometry;
D O I
10.1007/s00231-019-02583-4
中图分类号
O414.1 [热力学];
学科分类号
070201 [理论物理];
摘要
In this study, a fluid-structure interaction (FSI) simulation of the blood flow in the femoral artery with a small occlusion is presented. For a more accurate simulation of the real conditions, computerized tomography (CT) scan was used to obtain a 3-D model of leg blood vessels, while the vessel was modeled as an isotropic elastic wall. By assuming a heartbeat period of 0.5s, the inlet condition was considered as a time-dependent pulse using a non-Newtonian flow model. Blood flow was assumed nonlinear and incompressible, and Carreau model was used for blood rheological model.By considering unstable blood flow at the inlet, the involved hemodynamic parameters are velocity profile, vortices shapes, pressure drop, and streamlines. Furthermore, to determine the relationship between flow geometry and the vascular wall, wall shear stress (WSS) was calculated.By taking the real geometry of the vessel and fluidity of blood into account, comparison of computational results indicated a significant difference in velocity distribution and shear stress depending on whether the fluid-structure interaction is considered Newtonian or non-Newtonian. The results showed that employing Newtonian models for the blood flow does not lead to promising results at occluded areas and beyond them.
引用
收藏
页码:2037 / 2047
页数:11
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