弯曲圆管入口段定常流动的三维数值模拟-YUY泵网.PDF

医用生物力学 　2004 年 6 月 　第 19 卷 　第 2 期 Journal of Medical Biomechanics , Vol19 　No 2 , J une 　2004 65 文章编号 : (2004) ·基础研究· 弯曲圆管入口段定常流动的三维数值模拟 刘珊 ,丁祖荣 (上海交通大学船舶海洋与建工学院 ,上海 200030) 摘要 : 　目的 　研究定常流动条件下弯曲圆管入口段内的流动情况。方法 　用有限体积法对弯曲圆管入口段定常 流动作三维数值模拟。结果 　分别计算了管内流线、截面等速度线、沿对称面直径的速度剖面和壁面切应力分布 等。沿对称面直径的速度剖面计算值与实验结果吻合很好。结论 　弯管的外侧壁是高切应力区 , 内侧壁是低切应 力区 ,证实内侧壁是动脉粥样斑块的高发区。 关键词 : 　弯管 ;入口段 ;有限体积法 ;壁面切应力 中图分类号: 　R318 01 ;R3221 　　　　文献标识码 : 　A Threedimensional Numerical Simulation of Steady Flowat the Entrance of Curved Pipe ( ) L IU Shan ,DING Zurong Department of Engineering Mechanics , Shanghai Jiaotong University , Shanghai 200030 , China Abstract : 　Objective 　To study steady flow characteristics at the entrance of curved pipe 　Methods 　Threedimension al numerical simulation was performed by finite volume method 　Results 　The streamline ,axial constant velocity lines in the crosssection ,velocity profile along the diameter of the crosssection in symmetric plane ,and the distribution of wall shear stress were calculated respectivelyThe calculated values of the velocity profile along the diameter of the crosssection were found to coincide fairly well with experimental results 　Conclusion 　The outside wall of curved pipe was the region with high shear stress while the inside wall was the one with low shear stress , which might explained that the preferential region of atherosclerosis Key word : 　Curved pipe ; Entrance flow ; Finite volume methods