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系統識別號 U0002-0708201218165800
中文論文名稱 雙葉及三葉機械心瓣流場流固耦合數值計算
英文論文名稱 Numerical simulation of the flow field across a bileaflet and a trileaflet mechanical heart valve using fluid-structure interaction method
校院名稱 淡江大學
系所名稱(中) 水資源及環境工程學系碩士班
系所名稱(英) Department of Water Resources and Environmental Engineering
學年度 100
學期 2
出版年 101
研究生中文姓名 李德倫
研究生英文姓名 Te-Lun Li
學號 699480405
學位類別 碩士
語文別 中文
口試日期 2012-07-13
論文頁數 70頁
口試委員 指導教授-盧博堅
委員-丁大為
委員-張正興
委員-盧博堅
中文關鍵字 機械心瓣  數值模擬  流固耦合 
英文關鍵字 mechanical heart valve  numerical simulation  fluid-structure interaction 
學科別分類 學科別＞應用科學＞環境工程
中文摘要 許多統計資料指出，心血管疾病是現代人死亡原因的前幾名，而心臟瓣膜的疾病就是其中一種。心臟瓣膜置換手術對心臟病患者已經是一個發展健全且有效的治療方式。然而過去的研究結果指出，通過單葉片或雙葉片機械心瓣的流場容易造成溶血及血栓之現象。而發生之可能原因包含流場中之切應力過大，以及葉片的關閉速度過快造成穴蝕的發生，當穴蝕汽泡爆破時，產生之高壓會破壞血球及血小板。三葉片機械心瓣主要是依靠主動脈竇中之渦漩來幫助葉片之關閉，與單葉片或雙葉片機械心瓣依靠反向流推動葉片來關閉不同，因此其葉片的關閉速度較為緩慢，可以減少穴蝕發生的機會。本研究利用數值模擬的商用軟體Fluent，模擬這雙葉及三葉機械心瓣的流場，並與過去學者做比較，以確認模擬之結果是否正確，期望對於日後三葉片機械心瓣的研發上有所助益。
英文摘要 A lot of statistical data indicate that cardiovascular disease is the first several cause of death of modern people, and heart valve disease is on of them. Heart valve replacement surgery is a well developed and efficient therapeutic option for terminally ill cardiac patients. Previous researchers indicated that the phenomenon of hemolysis and thrombosis would occur in the flow fields across the monoleaflet or bileaflet mechanical heart valves. The probable reasons of causing hemolysis and thrombosis included shear stresses in the flow fields might be large enough to damage red blood cells, and the closing velocity of the leaflet was excessively large to cause cavitation phenomenon. Commercial software Fluent was also applied to run numerical simulations of these two valves in this study. The results of numerical simulations would be valid with the experiments and were expected to be useful for the development of the trileaflet valve in the future.
論文目次 目錄 I
第一章 緒論 1
1-1 前言 1
1-2 研究動機及目的 5
1-3 研究過程 7
第二章 數值方法的設定與模式的模擬 9
2-1模擬模型 9
2-2 模擬方法 10
2-3參數設置 12
第三章 結果與討論 13
3-1 心瓣運動行為 13
3-2流場分析 17
第四章 結論 22
參考文獻 24
附圖 27
附表 69
參考文獻 1. http://www.doh.gov.tw/CHT2006/DM/SEARCH_RESULT.aspx
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