請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/43628
完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 潘國隆(Kuo-Long Pan) | |
dc.contributor.author | Ming-Wei Liao | en |
dc.contributor.author | 廖明威 | zh_TW |
dc.date.accessioned | 2021-06-15T02:24:41Z | - |
dc.date.available | 2010-08-20 | |
dc.date.copyright | 2009-08-20 | |
dc.date.issued | 2009 | |
dc.date.submitted | 2009-08-18 | |
dc.identifier.citation | Adam, J. R., Lindblad, N. R. and Hendricks, C. D. (1968) The collision, coalescence, and disruption of water droplets. J. Appl. Phys., vol. 39, pp. 5173.
Ashgriz, N. and Poo, J. Y. (1990) Coalescence and separation in binary collisions of liquid drops. J. Fluid Mech., vol. 221, pp. 183-204. Brazier-Smith, P. R., Jennings, S. G. and Latham, J. (1972) The interaction of falling water drops: coalescence. Proc. R. Soc. Lond. A., vol. 32, pp. 393-408. Dai, M. and Schmidt, D. P. (2005) Numerical simulation of head-on droplet collision : effect of viscosity on maximum deformation. Physics of Fluids, vol. 17, 041701. Estrade, J. P. (1998) Etude experimentale et numerique de la collision de gouttelettes. Ph. D. thesis, ONERA Toulouse. Gotaas, C., Havelka, P. H., Jakobsen, A. and Svendsen, H. F. (2007) Effect of viscosity on droplet-droplet collision outcome: Experimental study and numerical comparison. Physics of Fluids, vol. 19, pp. 102106. Glatzel, T. et al. (2007) Computational fluid dynamics (CFD) software tools for microfluidic applications – a case study. Compters Fluids, vol. 37, pp. 218-235 Gunn, R. (1965) Collision characteristics of freely falling water drops. Science, vol. 150, no. 3697, pp. 695-701. Hirt, C. W. and Nichols, B. D. (1981) Volume of fluid (VOF) method for the dynamics of free boundaries. J. Comp. Phys., vol. 39, pp. 201-225. Hong, Y. and Wang, F. (2007) Flow rate effect on droplet control in a co-flowing microfluidic device. Microfluid Nanofluid, vol. 3, pp. 341-346. Inamuro, T., Ogata, T., Tajima, S. and Konishi, N. (2004) A lattice Boltzmann method for incompressible two-phase flows with large density differences. J. Comp. Phys., vol. 198, pp. 628-644. Inamuro, T., Tajima, S. and Ogino F. (2003) Lattice Boltzmann simulation of droplet collision dynamics. Int. J. Heat Mass Transfer, vol. 47, pp. 4649-4657. Jiang, Y. J., Umemura, A. and Law, C. K. (1992) An experimental investigation on the collision behaviour of hydrocarbon droplets. J. Fluid Mech., vol. 234, pp. 171-190. Kothe, D. B., Rider, W. J., Mosso, S. J. and Brock, J. S. (1996) Volume tracking of interfaces having surface tension in two and three dimensions. AIAA Paper, 96-0859. List, R. and Whelpdale, D. M. (1968) A preliminary investigation of factors affection the coalescence of colliding water drops. J. Atmos. Sci., vol. 26, pp. 305-308. Magarvey, R. H. and Gelart, J. W. (1961) Drop collisions under conditions of free fall. J. Atmos. Sci., vol. 19, pp. 107-113. Mehdi-Nejad, V., Mostaghimi, J. and Chandra, S. (2002) Air bubble entrapment under an impacting droplet. Physics of Fluid, vol. 15, pp. 173-183. Montgomery, D. N. (1971) Collision and coalescence of water drops. J. Atmos. Sci., vol. 28, pp. 291-293. Nobari, M. R., Jan, Y. J. and Tryggvason, G. (1996) Head-on collision of drops–A numerical investigation. Physics of Fluids, vol. 8, pp. 29. Noh, W. F. and Woodward, P. R. (1976) SLIC Simple Line Interface Method. In A. I. van de Vooren and P. J. Zandbergen, editors, Lecture Notes in Physics 59, pp. 330-340 Pan, K. L., Chou, P. C. and Tseng, Y. J. (2009) Binary droplet collision at high Weber number. received by Phys. Rev. E. Pan, K. L., Law, C. K. and Zhou, B. (2008) Experimental and mechanistic description of merging and bouncing in head-on binary droplet collision. J. Appl. Phys., vol. 103, 064901. Pan, Y. and Suga, K. (2005) Numerical simulation of binary liquid droplet collision. Physics of Fluids, vol. 17, 082105. Qian, D. and Lawal, A. (2006) Numerical study on gas and liquid slugs for Taylor flow in a T-junction microchannel. Chem. Engi. Sci., vol. 61, pp. 7609-7625 Qian, J. and Law, C. K. (1997) Regimes of coalescence and separation in droplet collision. J. Fluid Mech., vol. 331, pp. 59-80. Rider, W. J., Kothe, D. B., Mosso, S. J., Cerrutti, J. H. and Hochstein, J. I. (1995) Accurate solution algorithms for incompressible multiphase fluid flows. AIAA Paper, 95-0699. Rieber, M. and Frohn, A. (1995) Three-dimensional Navier-Stokes simulation of binary collision between droplets of equal size. J. Aero. Sci., vol. 26, pp. S929-S930. Schelkle, M. and Frohn, A. (1995) Three-dimensional lattice-Boltzmann simulation of binary collision between droplets of equal size. J. Aero. Sci., vol. 26, pp. S145-S146. Tanguy, S. and Berlemont, A. (2005) Application of a level set method for simulation of droplet collisions. Int. J. Multiphase Flow, vol. 31, pp. 1015-1035. Tryggvason, G. et al. (2001) A front-tracking method for the computations of multiphase flow. J. Comp. Phys., vol. 169, pp. 708-759. Unverdi, S. O. (1990) Numerical simulations of multi-fluid flows. Ph. D. thesis, University of Michigan. Unverdi, S. O. and Tryggvason, G. (1992) A front-tracking method for viscous, incompressible, multi-fluid flows. J. Comp. Phys., vol. 100, pp. 25-37. Willis, K. and Orme, M. (2003) Binary droplet collisions in a vacuum environment: an experimental investigation of the role of viscosity. Exp. Fluids, vol. 34, pp. 28. Whelpdale, D. M. and List, R. (1971) The coalescence process in raindrop growth. J. Geo. Res., vol. 76, pp. 2836-2856. Xing, X. Q., Butler, D. L. and Yang, C. (2006) Lattic Boltzmann-based single-phase method for free surface tracking of droplet motion. Int. J. Num. Fluids, vol. 56, pp. 333-351. Zheng, H. W., Shu, C. and Chew, Y. T. (2006) A lattice Boltzmann model for multiphase flows with large density ratio. J. Comp. Phys., vol. 218, pp. 353-371. 高天冀(1998) 液滴碰撞行為分析和液滴產生器研發設計。碩士論文,國立成功大學機械工程學系。 周坤毅(2004) 表面張力差異對雙液滴碰撞之影響。碩士論文,國立清華大學動力機械工程系。 周秉忠(2008) 不同表面張力水溶液之高速雙液滴碰撞。碩士論文,國立台灣大學機械工程系。 曾煜仁(2008) 不同歐氏數之高速雙液滴碰撞。碩士論文,國立台灣大學機械工程系。 | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/43628 | - |
dc.description.abstract | 本文利用面追蹤法(front-tracking method)與流體體積法(VOF)數值模擬雙液滴碰撞,並且與實驗結果相互比較。在多相流(multiphase flow)的模擬中,面追蹤法的介面(front)設定是遵循實驗經驗所得,藉由指定中間液體薄膜破掉的時刻,使得模擬結果與實驗相符合。以流體體積法模擬中高速液滴碰撞時,需在介面處增加其黏性,減少因表面張力所產生的切線速度,讓液滴於拉扯過程中不至於破裂。流場模擬條件設定為兩相同尺寸的液滴正撞(head-on)於一大氣壓空氣中,溶液分別為水及十四烷,預測液滴在碰撞後的介面變化與現象。高速液滴碰撞情形下,我們使用流體體積法模擬三維流場中液滴於碰撞後的結果,評估應用套裝軟體CFD-ACE求解器在流體體積法模擬真實液滴碰撞流場的可行性。 | zh_TW |
dc.description.abstract | This study focuses on numerical simulation for binary droplets collision. We compare the numerical results with the experimental ones by front-tracking method and volume of fluid (VOF) method. Front-tracking method is controlled artificially by prescribing the rupture of the inter-drop film in multiphase flow, and the simulation results are consistent with the experimental ones. In high-speed droplet collision, the surface tension force damping option in VOF increases the viscosity in the vicinity of the interface, which damps the capillary wave effect that is invariably generated at the interface by the surface tension. In the view of physics, the droplets are not supposed to rupture in the separation regime. Therefore, if the surface tension force damping option is selected, the droplet does not rupture during the collision. The simulation condition of head-on collision of binary equal-size droplets is set. Water and tetradecane are used to be the liquid phases to predict the phenomena of droplet collision under the atmosphere. We examine the feasibility of droplet collision simulation with VOF in CFD-ACE solver. The 3D simulation results of high-speed droplet collision are obtained by VOF. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T02:24:41Z (GMT). No. of bitstreams: 1 ntu-98-R96522316-1.pdf: 44681082 bytes, checksum: ff8053a312d7cc85a0718b7ae5e70985 (MD5) Previous issue date: 2009 | en |
dc.description.tableofcontents | 誌謝 i
摘要 iii Abstract v 目錄 vii 表目錄 ix 圖目錄 x 符號說明 xii 第一章 序論 1 1.1 簡介 1 1.2 文獻回顧 2 1.2.1 液滴之碰撞現象 2 1.2.2 液滴之碰撞模擬 5 1.3 研究目的及動機 7 第二章 數值方法 9 2.1 數值模型與方法簡介 9 2.1.1 流體體積法(Volume of Fluid Method) 9 2.1.2 Front-tracking方法與流場 11 2.2 軟體實例測試與驗証 12 2.2.1 在微流道共流裝置中流量控制對於液滴的影響 12 2.2.2 T型微渠道的泰勒流動 14 2.2.3 Laplace law驗證 15 第三章 流場模擬 17 3.1 流場計算模型與簡化 17 3.1.1 液滴碰撞理論 17 3.1.2 基本假設與計算幾何形狀 18 3.2 網格獨立、收斂條件與鬆弛因子 20 3.3 疊代時間步數的選擇 21 3.4 Removal of Flotsam and Jetsam 22 3.5 平行處理 22 第四章 結果與討論 23 4.1 使用front-tracking方法與流體體積法方法模擬結合、彈開 23 4.1.1 結合(coalescence) 23 4.1.2 彈開(bouncing) 25 4.2 使用流體體積方法模擬分離、分離後產生衛星液滴 27 4.2.1 分離(separation)、分離後產生衛星液滴(separation with satellite) 27 4.2.2 分離後產生衛星液滴(separation with satellite) 28 4.3 使用流體體積法方法模擬高速液滴碰撞 29 4.3.1 指狀(fingering) 30 4.3.2 飛濺(splattering) 31 第五章 結論 33 5.1 要點總結 33 5.2 未來發展與期許 34 參考文獻 35 附錄A Fluent模擬結果 98 表目錄 表3.1 流體性質 39 表3.2 收斂準則 39 圖目錄 圖2.1 CFD-ACE求解過程(CFD-ACE web help) 40 圖2.2 網格與幾何邊界條件 40 圖2.3 層流流場Ca = 0和Re = 4 41 圖2.4 層流流場Ca = 0和Re = 4,CFD-ACE 41 圖2.5 液滴分離流場Ca = 0.111和Re = 4 41 圖2.6液滴分離流場Ca = 0.111和Re = 4,CFD-ACE 41 圖2.7 液滴尺寸、流量與Ca之關係圖 42 圖2.8 T型微渠道流場之幾何外型 42 圖2.9 Fluent(上)與CFD-ACE(下) T型微渠道模擬比較時序圖 43 圖2.10 在2D與2D軸對稱之Laplace law 44 圖3.1 兩相同尺寸之液滴碰撞幾何參數 45 圖3.2 水滴在一大氣壓的空氣下碰撞現象與對應韋伯數、撞擊參數之關係 45 圖3.3 碳氫化合物在一大氣壓的空氣下碰撞現象與對應韋伯數、撞擊參數之關係 46 圖3.4 雙液滴碰撞二維流場幾何外型 46 圖3.5 雙液滴碰撞三維流場幾何外型 47 圖3.6 二維流場流體體積法二相設置圖 47 圖3.7三維流場流體體積法二相設置圖 48 圖3.8 網格數目與絕對誤差關係圖 48 圖3.9 各種不同網格尺寸液滴內平均速度 49 圖4.1十四烷於一大氣壓空氣之液滴碰撞:結合(coalescence),區域(I) 50 圖4.2 十四烷於一大氣壓空氣之液滴碰撞:結合(coalescence),區域(III) 54 圖4.3 十四烷於一大氣壓空氣之液滴碰撞:彈開(bouncing),區域(II) 59 圖4.4 十四烷於一大氣壓空氣之液滴碰撞:彈開(bouncing),區域(II) 62 圖4.5 彈開流場體積分率輪廓圖 67 圖4.6 彈開中間液體薄層 67 圖4.7 碰撞前彈開體積分率輪廓圖 67 圖4.8 碰撞前結合體積分率輪廓圖 68 圖4.9 彈開壓力分佈圖 68 圖4.10 水於一大氣壓空氣之液滴碰撞:分離(separation) 69 圖4.11 拉伸時壓力場 75 圖4.12 分離時壓力場 75 圖4.13 水於一大氣壓空氣之液滴碰撞:分離後生成衛星液滴(separation with satellite) 76 圖4.14 十四烷於一大氣壓空氣之液滴碰撞:分離後生成衛星液滴(separation with satellite) 80 圖4.15 瞬間分離出衛星液滴剖視圖 83 圖4.16 水於一大氣壓空氣之液滴碰撞:指狀(fingering) 84 圖4.17 水於一大氣壓空氣之液滴碰撞:指狀(fingering),網格加密 88 圖4.18水於一大氣壓空氣之液滴碰撞:指狀(fingering),俯視圖 91 圖4.20水於一大氣壓空氣之液滴碰撞:指狀(fingering),速度向量圖 92 圖4.21 水於一大氣壓空氣之液滴碰撞:飛濺(splattering) 93 圖4.22 二維流場飛濺現象 96 圖4.23 飛濺側視圖 96 圖4.24 飛濺向量圖 97 圖A.1 使用Fluent套裝軟體模擬液滴碰撞之分離現象 98 | |
dc.language.iso | zh-TW | |
dc.title | 以面追蹤法及流體體積法數值模擬液滴碰撞之研究 | zh_TW |
dc.title | Front-Tracking Method and Volume of Fluid Method Numerical Simulations for Binary Droplet Collision | en |
dc.type | Thesis | |
dc.date.schoolyear | 97-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 楊鏡堂(Jing-Tang Yang),王興華(Ching-Hua Wang),楊照彥(Jaw-Yen Yang) | |
dc.subject.keyword | 多相流,數值模擬,液滴碰撞,流體體積法,面追蹤法, | zh_TW |
dc.subject.keyword | multiphase flow,numerical simulation,droplet collision,volume of fluid method,front-tracking method, | en |
dc.relation.page | 98 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2009-08-18 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
顯示於系所單位: | 機械工程學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-98-1.pdf 目前未授權公開取用 | 43.63 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。