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研究生： 盧俊利
Lu, Jun-li
論文名稱： 非平面繞道管格點與流場研究
Grid Generation and Flow Field in a Non-Planar Bypass Tube
指導教授： 李定智
Lee, Den-z
學位類別： 碩士
Master
系所名稱： 工學院 - 航空太空工程學系
Department of Aeronautics & Astronautics
論文出版年： 2003
畢業學年度： 91
語文別： 中文
論文頁數： 105
中文關鍵詞： 壁面剪應力 、非平面 、格點產生 、繞道管 、迴流
外文關鍵詞： Grid Generation, Reversed Flow, Bypass Tube, Wall Shear Stress, Non-Planar
相關次數： 點閱：76  下載：1 
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    • 本文係設定一特定非平面繞道管型態的幾何外型與基本平面繞道管血液流場做比較，並分析其流場的速度分佈、剪應力（率）分佈、迴流區位置之間的差異性。
    研究的方法是利用SIMPLER為主要的運算法，採用有限控容法，配合非交錯式格點與邊界契合座標對流場進行模擬。並使用區域式格點法，將整個流場分區計算，再透過界面處理將各區連接起來，即可得到完整的流場解。分析結果顯示，繞道管附近的流場會因為幾何形狀的改變而易出現異常流況。非平面繞道管扭轉的角度愈大，愈易增加迴流區分佈面積、壁面剪應力變化也較劇烈。

    Blood flow filed of planar and non-planar bypass tubes are compared in the present study. We observe and discuss the velocity profiles and distribution of the wall shear stress and the locations of flow reversed region are presented.

    The simulation of flow field employs SIMPLE-R algorithm with finite volume method, non-staggered grid and boundary fitted coordinate. Finite volume method is extremely limited in the physically complex flow field. As for the grid generation, the whole field is divided into three sub-regions which can be more easily calculated. Calculations are performed iteratively in the three sub-regions. Treatment of interface is discussed briefly.

    中文摘要 ...............................................Ⅰ 英文摘要 ...............................................Π 誌 謝 ...............................................Ⅲ 目 錄 ................................................Ⅳ 圖 目 錄 ................................................Ⅶ 符號說明 ……………………………………………………………XII 第一章 緒論 ……………………………………………1 1-1 簡介 …………………………………………………………1 1-2 文獻回顧 ……………………………………………5 1-3 研究動機 ……………………………………………9 1-4 研究目的 …………………………………………………9 第二章 統御方程式與數值方法 ………………………………10 2-1 統御方程式 …………………………………………………10 2-2 座標轉換………………………………………………………11 2-3 數值方法………………………………………………………13 2-3-1 動量方程式之離散化…………………………………13 2-3-2 動量內插法……………………………………………16 2-3-3 第一壓力修正方程式 …………………………………18 2-3-4 第二壓力修正方程式………………………………19 2-3-5 邊界條件……………………………………………………19 2-3-6 收斂標準 …………………………………20 2-4 計算過程 ………………………………………………21 第三章 格點系統的產生……………………………………………22 3-1 格點產生的方法 ……………………………………………22 3-2 區域格點法 …………………………………………………23 3-2-1 界面處理 ………………………………………………23 3-2-2 計算程序 ………………………………………………26 3-3 非平面繞道管格點外型建構 ………………………………26 3-3-1 外形參數定義 ……………………………………………26 3-3-2 非平面繞道管扭轉外型的建立 …………………………27 3-3-3 外型格點建造測試 ………………………………………28 第四章 結果與討論 ……………………………………………30 4-1 基本外型及流場中各項參數 ………………………………30 4-1-1 基本外型 …………………………………………………30 4-1-2 參數定義 …………………………………………………31 4-2 非平面繞道管基本流場之流場分析…………………32 4-3 不同雷諾數對流場的影響……………………………34 4-3-1繞道管各區速度剖面分佈表現……………………………34 4-3-2繞道管剪應率分佈情況……………………………………36 4-3-3迴流區分佈位置及所佔面積大小的影響…………………37 4-3-4壁面剪應力分佈位置及所佔面積大小的影響……………38 4-4 不同平面扭轉角度差對流場的影響…………………38 4-4-1繞道管各區速度剖面分佈表現……………………………38 4-4-2繞道管剪應率分佈情況……………………………………39 4-4-3迴流區分佈位置及所佔面積大小的影響…………………40 4-4-4壁面剪應力分佈位置及所佔面積大小的影響……………41 第五章 結論……………………………………………………………43 參考文獻 ………………………………………………………………46 附 錄 ………………………………………………………………50自 述………………………………………………………………104

    1. M.H. Friedman, O.J. Deters and C.B. Bar Bargeron,“Shear-Dependent Thickening of the Human Arterial Intima”, Atherosclerosis,60,pp. 161-171, 1986.

    2. D.L. Fry, “Certain Histological and Chemical Responses of the Vascular Interface to Acutely Induced Mechanical Stress in the Aorta of the Dog”, Circulation Res., Vol.24, pp.93-108, 1969.

    3. C.G. Caro, “Transport of C-4-Cholesterol Between Perfusing Serum and Dog Common Carotid Artery-A Shear Dependent Process”, Cardiovasc Res., 8, pp.194, 1974.

    4. R.M. Nerem, “Hemodynamics and the Arterial Wall: An Introduction”,J. of Biomechanical Engineering Vol. 103, pp.171, 1981

    5. R.M. Nerem, “Vascular Fluid Mechanics, the Arterial Wall and Atherosclerosis”, J. of Biomechanical Engineering Vol. 114, pp.274-278, 1992

    6. R.M. Nerem, M.J. Levesque and J.F. Cornhill, “Vascular Endothelial Morphology as and Indicator of the Pattern of Blood Flow”, J. of Biomechanical Engineering Vol. 103, pp.172-175, 1981

    7. C.W. Hartman, Y. Kong, et al., “Aortocoronary Bypass Surgery: Correlation of Angiographic, Symptomatic and Functional
    Improvement at 1 Year,” Am. J. Cardiol., Vol. 37, pp. 352-354, 1976

    8. Galego ,Goldenberg and Gomes ,“Comparative Blood Flow Study of Arteriovenous Fistulae in Canine Femoral Arteries:Modified Latero-Lateral and End-Lateral Techniques”,Artif Organs, Vol.24, No 3,2000

    9. C.G. Caro ,C.L. Dumoulin and S.J. Sherwin,“The Influence Of Out-of-Plane Geometry on the Flow Within a Distal End-to-Side Anastomosis”, J.Biomech.Eng,Vol.122,pp86-94,2000

    10. C.G. Caro,D.J. Doorly and Maria Tarnawski, “Non-planar curvature and branching of arteries and non-planar-type flow”,Proc. R. Soc. Lond. A ,Vol.452,pp.185-197,1996

    11. D. Lee and J.J. Chiu, “Intimal Thickening under Shear in A Carotid Bifurcation - A Numerical Study”, J.Biomechanics, 1996;29:1-11

    12. R.S. Keynton, S.E. Rittgers, M.C. Shu, “The Effect of Angle and Flow Rate upon Hemodynamics in Distal Vascular Graft Anastomose：An In Vitro Model Study”, J.Biomech.Eng.Vol.113, pp.458-463,1991.

    13. 趙士暉, “區域式格點法中界面處理之探討”, 國立成功大學航太所碩士論文, 1992.

    14. 林倫秋, “血流應力與血小板黏著分佈之關連：Y型管之血小板吸附分布實驗與探討”, 國立成功大學航太所碩士論文, 1999.

    15. 梁涵茵, “繞道管流場計算之數值研究”, 國立成功大學航太所碩士論文,2000.

    16. S. Majumdar, “Role of Underrelaxation in Momentum Interpolation of Flow with Non-staggered Grid”, Numerical Heat Transfer, Vol.13, pp.125-132, 1988.

    17. D. Lee and J.J. Chiu, “Covariant Velocity Based Calculation Procedure with Nonstaggered Grids for Computation of Pulsatile Flows”, Numerical Heat Transfer, Vol.21, part B, No.3, PP.269-286, 1992.

    18. R.Aris,“Vectors,Tensors and Basic Equation of Fluid Mechanics”,Prentice –Hall Inc. Englewood Cliffs, N.J.1962.

    19. Suhas V. patankar, “Numerical heat transfer and fluid flow”

    20. Takeshi Karino, “Microscopic Structure of Disturbed Flows in the Arterial and Venous Systems, and its Implication in the Localization of Vascular Diseases”, International Angiology, Vol.5, NO.4, pp.297-313,1986.

    21. J.J. Chiu, “Computation of Three Dimensional Branching Flows Using A Covariant Velocity Based Calculation Procedure and Zonal Grid Methods”, Ph.D. Thesis. NCKU, 1992.

    22. W. Shyy and S.M. Correa, “A Systematic Comparison of Several Numerical Schemes for Complex Flow Calculation”, AIAA paper 85-0440,1985.

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