https://scholars.lib.ntu.edu.tw/handle/123456789/80039
DC 欄位 | 值 | 語言 |
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dc.contributor | 李雨 | en |
dc.contributor | 臺灣大學:應用力學研究所 | zh_TW |
dc.contributor.author | 蔡政村 | zh |
dc.contributor.author | Tsai, Jeng-Tsun | en |
dc.creator | 蔡政村 | zh |
dc.creator | Tsai, Jeng-Tsun | en |
dc.date | 2006 | en |
dc.date.accessioned | 2007-11-29T02:20:15Z | - |
dc.date.accessioned | 2018-06-29T00:10:57Z | - |
dc.date.available | 2007-11-29T02:20:15Z | - |
dc.date.available | 2018-06-29T00:10:57Z | - |
dc.date.issued | 2006 | - |
dc.identifier | zh-TW | en |
dc.identifier.uri | http://ntur.lib.ntu.edu.tw//handle/246246/62503 | - |
dc.description.abstract | 本文利用CFDRC軟體作為分析工具,尋求以不對稱擋體作流體導向(簡稱O型)的無閥門微幫浦與脈衝流場混合器之設計。此一幫浦的特色為直接建構在矩形截面的直微流道上,以壓電薄膜作為一驅動源,在壓電薄膜上下游各裝置一梯形擋體作流體導向裝置;而脈衝流場混合器則是利用入口流體速度差與梯形擋體破壞流體介面,藉以增強混合。對於O型無閥門微幫浦,本文討論各種幾何條件及工作參數,得到流道中的最小截面寬對流場的影響,較擋體導角曲率半徑的影響為大;而破壞擋體構形會對淨流量造成影響,若破壞的體積愈大,改變的流量值愈多;而改變幫浦吸入與排出過程的時間比,會影響其淨流量大小,並且流量改變幅度與工作頻率有關。在脈衝流場混合器方面,首先我們模擬文獻中的微混合器,以驗證我們計算的正確性。本文並探討了多種的二維直管流狀況,得到在流道中放置擋體,脈衝流場提升混合效應的幅度最大,且注入狀態若為ABA排列(指流體A沿流到兩壁注入,另一流體B由流道中央注入),對於混合效果更為良好。我們也探討雷諾數Re與史卓荷數St對脈衝流場混合器之影響,得知在雷諾數小於5,脈衝流場混合器的混合效應相當良好,而當Re=0.5有一個最佳值,並且得到最適合脈衝流場混合器的操作頻率參數為St=19.2。 | zh_TW |
dc.description.abstract | We use the CFDRC software to do the research about the valveless micro-pump which is by means of asymmetric obstacles to control the direction and the volume flow rate of the flow. The design can be taken as a mechanical valveless micro-pump driven by a piezo film. We also study about the mixer using time pulsing flows. We illustrate the technique by studying mixing in a simple channel which contains obstacles as well as physically mixing two aqueous reagents. After analyzing the results, We can obtain some conclusions. If we change the size of the narrowest part of the channel, it will has a greater effect for the volume flow rate of the flow than if we change the curvature of the angle of the obstacle. It can improve the volume flow rate of the flow by means of changing the ratio of time for puming mode and suction mode of the pump. We also disscuss mixing effeciency about several different 2D flow. We get the fact that time pulsing flows with a obstacle have a great improvement about the mixing effeciency. Furthermore, we changed Reynolds number and Strohul number to observe the mixing efficiency. We get the best mixing contion for the mixer is Re=0.5 and St=19.2. | en |
dc.description.tableofcontents | 目 錄 摘要 I 目錄 Ⅲ 圖表說明 Ⅴ 符號說明 ⅩⅣ 第一章 導論1 1.1 研究背景1 1.2 無閥門微型幫浦的結構與工作原理4 1.3 文獻回顧6 1.4 研究目的13 1.5 本文架構15 第二章 理論基礎16 2.1 基本假設16 2.2 統御方程式17 2.3 邊界條件18 2.4 混合效率檢測20 第三章 數值方法22 3.1 有限體積法22 3.2 邊界條件設定26 3.3 收斂標準27 3.4 CFDRC軟體介紹27 第四章 結果與討論 32 4.1 與O型無閥門微幫浦實驗之比較 32 4.2 改變擋體構形對O型無閥門微幫浦流量影響33 4.3 改變壓電薄膜振動方式對微幫浦的流量影響35 4.4 與文獻上脈衝流場混合器的比較36 4.5 脈衝流場混合器37 4.6 脈衝流場混合器的混合效應分析46 4.7 雷諾數對脈衝流場混合器混合效應之影響52 4.8 史卓荷數對脈衝流場混合器混合效應之影響56 第五章 結論與後續工作60 5.1 結論 60 5.2 後續工作62 參考文獻64 附圖67 附表153 | zh_TW |
dc.format.extent | 4360361 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language | zh-TW | en |
dc.language.iso | en_US | - |
dc.subject | 無閥門 | en |
dc.subject | 微幫浦 | en |
dc.subject | 擋體 | en |
dc.subject | 脈衝流 | en |
dc.subject | 混合器 | en |
dc.subject | valve-less | en |
dc.subject | valveless | en |
dc.subject | micropump | en |
dc.subject | valveless pump,pulsatile flow | en |
dc.subject | mixer | en |
dc.title | 無閥門微幫浦及脈衝流場混合器的數值研究 | zh |
dc.title | Numerical Study of the Valveless Micropump and Pulsatile Flow Mixer | en |
dc.type | thesis | en |
dc.identifier.uri.fulltext | http://ntur.lib.ntu.edu.tw/bitstream/246246/62503/1/ntu-95-R93543034-1.pdf | - |
dc.relation.reference | [1] Devahastin, S., & Mujumdar, A. S., “A Numerical Study of Flow and Mixing Characteristics of Laminar Confined Impinging Streams,” Chemical Engineering Journal, Vol. 85, pp. 215-223, 2002. [2] Desmukh, A. A., Liepmann, D., & Pisano, A. P., “Continuous Micromixer with Pulsatile Micropumps,” Solid-State Sensor and Actuator Workshop, Hilton Head Island, SC, USA, 2000. [3] Gerlach, T., Schuenemann, M., Wurmus, H,. “A new micropump principle of the reciprocating type using pryramidic micro flow channels as passive valves,” Journal of Micromechanics and Microengineering, Vol. 5, pp. 199 - 201, 1995. [4] Gobby, D., Angeli, P., and Gavriilidis, A., “Mixing Characteristics of T-type Microfluidic Mixers,” Journal of Micromechanics and Microengingeering, Vol. 11, pp. 126-132, 2001. [5] Glasgow, I., Aubry, N., “Enhancement of Microfludic Mixing Using Time Pulsing,” Journal of Lab on a Chip, Vol. 3, pp. 114-120, 2003. [6] Koch, M., Chatelain, D., Evans, A. G. R., and Brunnshweiler, A., “Two Simple Micromixers Based on Silicon,” Journal of Micromechanics and Microengingeering, Vol. 8, pp. 123-126, 1998. [7] Liu, R. H., Stremler, M. A., Sharp, K. V., Olsen, M. G., Santiago, J. G., Aref, R. A. H., and Beebe, D. J., Member IEEE, “Passive Mixing in a Three- Dimensional Serpentine Microchannel,” Journal of Microelectromechanical System, Vol. 9, No. 2, 2002. [8] Olsson, A., Stemme, G., Stemme, E., “A valve-less planar fluid pump with two pump chambers,” Sensors and Actuators A., Vol. 46-47, pp. 549-556, 1995. [9] Olsson, A., Enoksson, P., Stemme, G., Stemme, E., “Micromachined flat - walled valve-less diffuser pumps,” Journal of micro- electromechanical systems, Vol. 6, No. 2, June, pp. 161-166, 1997. [10] Schwesinger, N., Frank, T., and Wurmus, H., “A Modular Microfluid System with an Integrated Micromixer,” Journal of Micromechanics and Microengingeering, Vol. 6, pp. 99-102, 1996. [11] Smith, L., “Micromachined nozzled fabricated with replicative method,” Micromechanics Europe 1990(MME ′90), Berlin, Germany, 26-27 November, pp. 53-57, 1990. [12] Stemme, E., Stemme, G., “A valve-less diffuser/nozzle-based fluid pump,” Sensors and Actuators A., Vol. 39, pp. 159-167, 1993. [13] Stroock, A. D., Dertinger, S. K., Whitesides, and G. M., and Ajdari, A., “Patterning Flows Using Grooved Surfaces,” Analytical Chemistry, Vol. 74, No. 20, pp. 5306-5312, 2002. [14] van Lintel, H., van de Pol, F., Bouwstra, S., “A piezoelectric micropump based on micromaching of silicon,” Sensors and Actuators A., Vol. 15, pp. 153-167, 1998. [15] CFDRC V2003 User Manuals. [16] 林建廷,“無閥門微型幫浦之理論分析”,國立台灣大學應用力學所碩士論文,2002. [18] 林俊達,“無閥門微型幫浦之數值模擬”,國立台灣大學應用力學所碩士論文,2003. [19] 凃智凱,“新式無閥門微型幫浦之開發”,國立台灣大學應用力學所碩士論文,2004. [20] 羅卓錚, “擋體式無閥門為幫浦之數值模擬” ,國立台灣大學應用力學所碩士論文,2004. [21] 田明偉, “微流道中以不對稱擋體作流場導向的研究” ,國立台灣大學應用力學所碩士論文,2005. | zh_TW |
item.fulltext | with fulltext | - |
item.cerifentitytype | Publications | - |
item.openairetype | thesis | - |
item.languageiso639-1 | en_US | - |
item.openairecristype | http://purl.org/coar/resource_type/c_46ec | - |
item.grantfulltext | open | - |
顯示於: | 應用力學研究所 |
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ntu-95-R93543034-1.pdf | 23.53 kB | Adobe PDF | 檢視/開啟 |
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