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| 腘动脉局部狭窄非牛顿特性流固耦合数值模拟分析 |
| Numerical analysis on non-Newtonian characteristics of local popliteal artery stenosis by fluid-structure interaction |
| 投稿时间：2023-10-08 |
| DOI：10.13259/j.cnki.eri.2024.04.007 |
| 中文关键词: 腘动脉 非牛顿流体 流固耦合 血流动力学 |
| 英文关键词:popliteal artery non-Newtonian fluid fluid-structure interaction hemodynamics |
| 基金项目:国家自然科学基金资助项目（12172227） |
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| 中文摘要: |
| 为比较不同血液模型对腘动脉狭窄血流动力学特性的影响，构建了腘动脉狭窄流固耦合数值模拟模型，以超声实测数据作为边界条件，分别使用牛顿流体、Carreau-Yasuds非牛顿流体模型对其进行数值模拟。结果表明，非牛顿流体模型模拟结果比牛顿流体模型模拟结果有着更多的低流速区域、更高的壁面剪切力和更均匀的流线。非牛顿流体模型的血管壁面剪切力数值高于牛顿流体模型的，牛顿流体模型的流线分布在狭窄处出现紊流，而非牛顿流体模型的流线分布较牛顿流体模型更平滑、均匀。非牛顿流体血液模型更适合对腘动脉进行血流动力学分析，在未来的数值模拟中应予以考虑。 |
| 英文摘要: |
| To analyze the effect of blood models on the hemodynamics of popliteal artery stenosis, a fluid-structure interaction model of popliteal artery stenosis was constructed. The boundary conditions were determined according to ultrasonic data. Newtonian fluid and Carreau-Yasuds non-Newtonian fluid models were used for numerical simulation. Results indicate that the non-Newtonian model exhibits larger low fluid velocity zone, elevated wall shear, and more uniform velocity streamlines than Newtonian model. The turbulent flow appears in the velocity streamlines of stenosis by Newtonian model, while the distribution of velocity streamlines by non-Newtonian model exibits more uniform and smoother. The non-Newtonian blood model is more appropriate for hemodynamic analysis of popliteal artery, which can be considered in future numerical simulation. |
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