基于两相流欧拉方法的中空纤维管血流动力学数值模拟  

Hemodynamic numerical simulation of hollow fiber tube based on two-phase flow Euler method

作　　者：朱桥辉 许少锋 王子恒 陆俊杰 张学昌 ZHU Qiaohui;XU Shaofeng;WANG Ziheng;LU Junjie;ZHANG Xuechang(School of Mechanical Engineering,Zhejiang University,Hangzhou 310027,China;School of Mechatronics and Energy Engineering,NingboTech University,Ningbo 315100,China;Faculty of Mechanical Engineering and Automation,Zhejiang Sci-Tech University,Hangzhou 310018,China)

机构地区：[1]浙江大学机械工程学院,浙江杭州310027 [2]浙大宁波理工学院机电与能源工程学院,浙江宁波315100 [3]浙江理工大学机械与自动控制学院,浙江杭州310018

出　　处：《大连理工大学学报》2024年第1期21-28,共8页Journal of Dalian University of Technology

基　　金：浙江省自然科学基金重点项目(LZ21A020001);国家自然科学基金资助项目(51605432);宁波市科技创新2025重大专项(2020Z112,2022Z007)。

摘　　要：对人工肝中空纤维管内血液两相流动进行了三维数值模拟,研究了中空纤维管内血流速度分布、红细胞径向体积分数分布、黏度分布以及壁面条件对红细胞体积分数分布的影响.结果表明,红细胞在轴心附近处黏度高,在壁面处黏度低;红细胞流速略大于血浆流速;红细胞沿径向体积分数分布呈双峰状,随各截面与入口距离增加,邻近壁面处的红细胞体积分数逐渐减小,壁面处的红细胞体积分数逐渐增大;不同壁面条件下,壁面处的红细胞体积分数随所受升力减小而增大,远离壁面运动趋势减弱.Three-dimensional numerical simulation of blood two-phase flow in artificial liver hollow fiber tubes is carried out,and blood flow velocity distribution,radial volume fraction distribution of red blood cells(RBC),viscosity distribution and the effects of wall surface conditions on volume fraction distribution of RBC are studied.The results show that the viscosity of RBC is high near the axis and low at the wall surface;the flow rate of RBC is slightly higher than that of plasma;the volume fraction distribution of RBC along the radial direction presents a bimodal shape,and with the increase of the distance from each section to the inlet,the volume fraction of RBC near the wall surface gradually decreases and the volume fraction of RBC at the wall surface gradually increases;under different wall surface conditions,the volume fraction of RBC at the wall surface increases with the decrease of the endured lift,and the tendency to move away from the wall surface weakens.

关 键 词：中空纤维管 血液两相流动 数值模拟 

分 类 号：O35[理学—流体力学]