國家衛生研究院 NHRI:Item 3990099045/1478
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 12145/12927 (94%)
造访人次 : 851690      在线人数 : 994
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 查询小技巧：
  • 您可在西文检索词汇前后加上"双引号"，以获取较精准的检索结果
  • 若欲以作者姓名搜寻，建议至进阶搜寻限定作者字段，可获得较完整数据
    •  进阶搜寻
    主页 ‧ 登入 ‧ 上传 ‧ 说明 ‧ 关于NHRI ‧ 管理 到手机版


    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.nhri.org.tw/handle/3990099045/1478


    题名: Numerical simulation of opening process in a bileaflet mechanical heart valve under pulsatile flow condition
    作者: Shi, YB;Zhao, Y;Yeo, TJH;Hwang, NHC
    贡献者: Division of Medical Engineering Research
    摘要: Background and aim of the study: Most previous computational fluid dynamics (CFD) studies of blood flow in mechanical heart valves (MHVs) have not efficiently addressed the important features of moving leaflet and blood-leaflet interaction. Herein, computationally efficient approaches were developed to study these features and to obtain better insight into the pulsatile flow field in bileaflet MHVs. Methods: A simple and effective method to track the moving boundary was proposed, and an efficient method for calculating the blood-leaflet interaction applied. In this way, a CFD code was developed to study the pulsatile flow field around bileaflet MHVs. The CFD code was parallelized on a supercomputer to reduce turn-around time in the simulation. The solver was then used to study the opening process in a St. Jude Medical (SJM) size 29 bileaflet MHV. Results: CFD results showed that, in the opening process, the flow field was consistently partitioned into two side channels and a central channel due to the presence of the two leaflets. In the flow field near the surface of the two leaflets, the fluid velocity followed the local surface velocity of the leaflets, thus showing a strong blood-leaflet interaction effect. Throughout the valve-opening process, peak velocities were always observed near the tips of the valve leaflet. The CFD simulation showed that the opening process took similar to0.044 s, which compared well with experimental findings. Conclusion: The new computational approaches were efficient and able to address the moving leaflet and blood-leaflet interaction. The flow field in the opening process of a SJM 29 bileaflet MHV was successfully simulated using the developed solver.
    关键词: Cardiac & Cardiovascular Systems
    日期: 2003-03
    關聯: Journal of Heart Valve Disease. 2003 Mar;12(2):245-255.
    Link to: http://www.ncbi.nlm.nih.gov/pubmed/12701798
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000181752900020
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0037356105
    显示于类别:[黃煥常(2000-2008)] 期刊論文

    文件中的档案:

    档案 描述 大小格式浏览次数
    ISI000181752900020.pdf508KbAdobe PDF625检视/开启


    在NHRI中所有的数据项都受到原著作权保护.

    TAIR相关文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈