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研究生： 郭志暐
Chih-Wei Kuo
論文名稱： 沾濕抑制數值模擬
numerical simulation of nonwetting
指導教授： 陳志臣
Jyh-Chen Chen
口試委員:
學位類別： 博士
Doctor
系所名稱： 工學院 - 機械工程學系
Department of Mechanical Engineering
畢業學年度： 94
語文別： 中文
論文頁數： 101
中文關鍵詞： 自由表面 、非沾濕 、數值模擬
外文關鍵詞： free surface, numerical simulation, nonwetting
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    • 摘要
    本研究以數值模擬的方式，詳細探討等溫以及熱毛細條件之下的沾濕抑制現象。液珠周遭的空氣，因為受到移動平板的剪應力或是熱毛細對流的作用，而流動到液珠與平板之間的間隙薄膜內，於是造成液珠與平板的沾濕抑制。
    等溫條件下，雷諾數可對應於移動平板所造成的剪應力影響，韋伯數可代表不同流體的液珠之變形程度。熱毛細條件下，馬洛哥尼數可對應於溫差所造成的熱毛細對流影響，毛細數可代表不同流體的液珠之變形程度。對於相同的流體，較大的雷諾數或是馬諾哥尼數，都可造成較大的沾濕抑制。在相同的移動平板速度下，具有較大韋伯數的液珠；以及在相同溫差下，具有較大毛細數的液珠，其自由表面頂點的內凹現象都會較明顯。在等溫以及熱毛細條件下，當兩板距離減少時，可以獲得更明顯的非沾濕效應。
    熱毛細非沾濕現象，只存在於將熱液珠靠近冷端牆的條件之下；反之，若以冷液珠靠近熱端牆，則無熱毛細沾濕抑制的現象出現。

    This present study was conducted by numerical simulation to discuss the isothermal and thermocapillary nonwetting phenomena. An interstitial film, induced either by shear stress or thermocapillary convection, forming the droplet nonwetting.

    目錄 摘要………………………………………………………………… I 致謝………………………………………………………………… II 目錄………………………………………………………………… III 圖表目錄…………………………………………………………… IV 符號說明…………………………………………………………… VII 第一章 緒論………………………………………………………… 1 第二章 物理模型與數學公式……………………………………… 9 第三章 數值方法與解題步驟……………………………………… 13 第四章 等溫沾濕抑制……………………………………………… 22 第五章 熱毛細沾濕抑制…………………………………………… 28 第六章 結論………………………………………………………… 34 第七章 建議………………………………………………………… 35 參考文獻 …………………………………………………………… 36

    1. G. P. Neitzel, and P. Dell’Aversana, Noncoalescence and Nonwetting Behavior of Liquids, Annu. Rev. Fluid Mech. 34 (2002) 267-289.
    2. L. Rayleigh, The influence of electricity on colliding water drops, Proc. R. Soc. London Ser. A 28 (1879) 406-409.
    3. L. Napolitano, R. Monti, and G. Russo, Marangoni convection in one- and two-liquids floating zones, Naturwissenschaften 73 (1986) 352-355.
    4. P. Dell’Aversana, J. R. Banavar, and J. Koplik, Suppression of coalescence by shear and temperature gradients, Phys. Fluids 8 (1996) 15-28.
    5. P. Dell’Aversana, V. Tontodonato, and L. Carotenuto, Suppression of coalescence and of wetting: The shape of the interstitial film, Phys. Fluids 9 (1997) 2475-2485.
    6. P. Dell’Aversana and G.. P. Neitzel, Behavior of noncoalescing and nonwetting drops in stable and marginally stable states, Expts. Fluids 38 (2004) 299-308.
    7. L. B. S. Sumner, A. M. Wood, and G. P. Neitzel, Lubrication analysis of thermocapillary-induced nonwetting, Phys. Fluids 15 (2003) 2923-2933.
    8. R. Monti and R. Savino, Correlation between experimental results and numerical solutions of the Navier-Stokes problem for noncoalescing liquid drops with Marangoni effects, Phys. Fluids 9 (1997) 260-262.
    9. R. Monti, R. Savino, M. Lappa and S. Tempesta, Behavior of drops in contact with pool surfaces of different liquids, Phys. Fluids 10 (1998) 2786-2796.
    10. J. C. Chen, J. C. Sheu, and S. S. Jwu, Numerical computation of thermocapillary convection in a rectangular cavity, Numer. Heat Trans. A 17 (1990) 287-308.
    11. J.-C. Chen, C.-W. Kuo, and G. P. Neitzel, Numerical simulation of thermocapillary nonwetting, submitted and accepted for publication by Int. J. Heat and Mass Transfer.
    12. L. B. S. Sumner, G. P. Neitzel, J.-P. Fontaine and P. Dell’Aversana, Oscillatory thermocapillary convection in liquid bridges with highly deformed free surfaces: Experiments and energy-stability analysis, Phys. Fluids 13 (2001) 107-120.
    13. P. Dell’Aversana, J. R. Banavar and J. Koplik, Suppression of coalescence by shear and temperature gradients, Phys. Fluids 8 (1996) 15-28.
    14. P. Dell’Aversana, V. Tontodonato and L. Carotenuto, Suppression of coalescence and of wetting: The shape of the interstitial film, Phys. Fluids 9 (1997) 2475-2485.
    15. P. Dell’Aversana and G. P. Neitzel, Behavior of noncoalescing and nonwetting drops in stable and marginally stable states, Expts. Fluids 36 (2004) 299-308.
    16. P. Dell’Aversana, and G. P. Neitzel, When liquids stay dry, Phys. Today 51 (1998) 38-41.
    17. G. P. Neitzel, and P. Dell’Aversana, Noncoalescence and nonwetting behavior of liquids, Annu. Rev. Fluid Mech. 34 (2002) 267-289.
    18. R. Monti and R. Savino, Correlation between experimental results and numerical solutions of the Navier-Stokes Problem for noncoalescing liquid drops with Marangoni effects, Phys. Fluids 9 (1997) 260-262.
    19. R. Monti, R. Savino and S. Tempesta, Wetting prevention by thermal Marangoni effect. Experimental and numerical results, Eur. J. Mech. B 17 (1998) 51-77.
    20. C.-W. Kuo, J.-C. Chen, and G. P. Neitzel, Numerical simulation of isothermal nonwetting, submitted and accepted for publication by Int. J. Numerical Methods in Fluids.
    21. J. Nalevanko, Design of an apparatus for investigation of 2-D liquid drop non-coalescence, M.S. thesis, Georgia Institute of Technology (1997)
    22. B. M. Carpenter and G. M. Homsy, Combined buoyant-thermocapillary flow in a cavity, J. Fluid Mech. 207 (1989) 121-132.
    23. S. Ostrach, Low-gravity fluid flows, Annu. Rev. Fluid Mech.14 (1982) 313-345.
    24. M. K. Smith, G. P. Neitzel. Multiscale modeling in the numerical computation of isothermal nonwetting, J. Fluid Mech. 554 (2006) 67-83.

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