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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 李雨(U Lei) | |
dc.contributor.author | Tsung-Han Wu | en |
dc.contributor.author | 吳宗翰 | zh_TW |
dc.date.accessioned | 2021-06-15T16:40:11Z | - |
dc.date.available | 2017-08-16 | |
dc.date.copyright | 2015-08-16 | |
dc.date.issued | 2014 | |
dc.date.submitted | 2015-08-11 | |
dc.identifier.citation | [1] Choi S. U. S. and Eastman J. A., “Enhancing thermal conductivity of fluids with nanoparticles,” Developments and Applications of non-Newtonian Flows, D. A. Siginer and H. P. Wang, eds., FED-vol. 231/MD-Vol, 66, ASME, New York, 99-105(1995).
[2] Masuda H., Ebata A., Teramae K., and Hishinuma N., “Alteration of thermalconductivity and viscosity of liquid by dispersing ultra-fine particles (dispersion of r-Al2O3, SiO2, and TiO2 ultra-fine particles),” Netsu Bussei (Japan), 4,227-233(1993). [3] Grimm A., “Powdered aluminum-containing heat transfer fluids,” German patent DE 4131516 A1(1993). [4] Maxwell J. C., “A treatise on electricity and magnetism,” Clarendon, Oxford, UK, (1873). [5] Murshed S., Leong K. and Yang C., “Thermophysical and electrokinetic properties of nanofluids – A critical review,” Applied Thermal Engineering, 28, 2109-2125(2008). [6] Keblinski P., Phillpot S.,Choi S. and Eastman J., “Mechanisms of heat flow in suspensions of nano-sized particles (nanofluids),” International Journal of Heatand Mass Transfer, 45,855-863(2002) [7] Prasher R., Song D., Wang J. and Phelan P., “Measurements of nanofluid viscosity and its implications for thermal applications,” Applied Physics Letters, 89, 133108(2006). [8] Jung J. and Yoo J., “Thermal conductivity enhancement of nanofluids in conjunction with electrical double layer (EDL),” International Journal of Heat and Mass Transfer, 52,525-528(2009). [9] Israelachvilli J. N., “Intermolecular and surface forces,” 3rd ed., Academic Press, (2011). [10] Hunter R. J., “Zeta potential in colloid science – Principles and Applications,” Academic Press, (1981). [11] Hunter R. J., “Foundations of colloid science,” Oxford University Press, New York, (2001). [12] Nandy P., Thiesen P., and Roetzel W., “Temperature Dependence of Thermal Conductivity Enhancement for Nanofluids,” Journal of Heat Transfer,125, 567-574(2003). [13] Wen D. and Ding Y., “Natural Convective Heat Transfer of Suspensions of Titanium Dioxide Nanoparticles (Nanofluids),” IEEE Transactions on Nanotechnology, 5(3),220-227(2006). [14] Nnanna A. G., “Experimental Model of Temperature-Driven Nanofluid,” Journal of Heat Transfer, 129,697-704(2007). [15] Dalkilic A., Kayaci N., Celen A., Tabatabaei M., Yildiz O., Daungthongsuk W. and Wongwises S., “Forced Convective Heat Transfer of Nanofluids – A Review of the Recent Literature,” Current Nanoscience, 8,949-969(2012). [16] Duangthongsuk W. and Wongwises S., “Effect of thermophysical properties models on the predicting of the convective heat transfer coefficient for low concentration nanofluid,” International Communications in Heat and Mass Transfer, 35,1320–1326(2008). [17] Farajollahi B., Etemad S. Gh., Hojjat M., “Heat transfer of nanofluids in a shell and tube heat exchanger,” International Journal of Heat and Mass Transfer, 53,12–17(2010). [18] Pak B. and Cho Y., “Hydrodynamic and heat transfer study of dispersed fluid with submicron metallic oxide particles,” Experimental Heat Transfer, 11,151-170 (1998). [19] Jung J. Y., Oh H. S., Kwak H. Y., “Forced convective heat transfer of nanofluids in microchannels,” International Journal of Heat and Mass Transfer, 52,466–472(2009). [20] 陳妍名, “微流道內奈米流體強制熱對流之實驗研究,” 國立台灣大學碩士論文(2013). [21] Mohammed H. A., Gunnasegaran P., Shuaib N. H., “Influence of channel shape on the thermal and hydraulic performance of microchannel heat sink,” International Communications in Heat and Mass Transfer, 37,1078–1086(2010). [22] Gunnasegaran P., Mohammed H. A., Shuaib N. H. and Saidur R., “The effect of geometrical parameters on heat transfer characteristics of microchannels heat sink with different shapes,” International Communications in Heat and Mass Transfer, 37,1078–1086(2010). [23] Mohammed H. A., Gunnasegaran P., Shuaib N. H., “Numerical simulation of heat transfer enhancement in wavy microchannel heat sink,” International Communications in Heat and Mass Transfer, 38,63–68(2011). | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/53030 | - |
dc.description.abstract | 奈米流體為均勻穩定地懸浮有奈米粒子的懸浮液。對水和不同體積分率的二氧化鈦奈米流體、在不同雷諾數及在不同輸入功率的情況下,本文以實驗方法研究直和曲折流道內的熱對流。PDMS流道、加熱電極和測溫電極一併以微機電製程建構在矽晶圓基板上,本文發現傳入到流道中流體的功率在不同參數下並不相同(大約為數%至80%),並發展出一方法以分析傳入流道和散逸至周圍功率的比例。實驗結果顯示對流熱傳係數隨雷諾數和體積分率的增加而上升,但奈米流體只較基礎流體略優,另曲折流道較直流道佳 | zh_TW |
dc.description.abstract | Nanofluid is a liquid suspended uniformly and stably with nano particles. The convection heat transfer of TiO2-water nanofluid in straight and zigzag micro channels were studied for different particle volume fractions, different Reynolds number and different applied heating power. The channels were fabricated with PDMS on a silicon wafer with also both the heating and temperature sensing electrodes deposited on the substrate. It was found that a different amount of input power (from several % up to 80% ) can be delivered to the fluid (water or nanofluid) flow inside the channel, and a method was proposed for quantifying such a power fraction, with the rest lost into the surrounding. For the forced that convection inside the channel, we found that the heat transfer coefficient increased as the Reynolds number increases (a feature for all the fluid), and as the volume fraction increases. However, the increase associated with the application of nanofluids is minor. Also the heat transfer of the zigzag micro channel is higher than that of the straight micro channel. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T16:40:11Z (GMT). No. of bitstreams: 1 ntu-103-R02543035-1.pdf: 1622913 bytes, checksum: 7da43b31d982883dd406260f12046d0a (MD5) Previous issue date: 2014 | en |
dc.description.tableofcontents | 致謝 i
摘要 ii Abstract iii 目錄 iv 圖目錄 vii 表目錄 ix 第一章 緒論 1 1.1研究目的與背景 2 1.2文獻回顧.. 3 1.2.1熱傳導係數 3 1.2.2布朗運動(Brownian Motion) 4 1.2.3電雙層 4 1.2.4對流熱傳導特性 5 1.3本文架構 7 第二章 理論與實驗裝置 8 2.1實驗裝置原理 8 2.2流道設計 11 2.3黏度計原理 12 第三章 實驗方法與設備 13 3.1測溫電極與加熱電極的設計與製程 14 3.1.1基材清洗 14 3.1.2金屬蒸鍍 15 3.1.3電極的微影製程 16 3.1.4矽晶圓的切割與電極的外部連接 18 3-2微流道的設計與製程 18 3.2.1微流道母模的設計與製程 19 3.2.2 PDMS的調配與翻模 21 3.2.3 PDMS與矽晶圓的接合 21 3.3奈米流體的選用和調配方法 22 3.4溫度感測電極校正 24 3.5自然對流量測 25 3.6實驗儀器與架設 26 第四章 實驗結果與討論 28 4.1測溫電極回歸方程式及流體雷諾數 28 4.1.1測溫電極回歸方程式 28 4.1.2流體的雷諾數 30 4.2奈米流體之溫度量測 31 4.2.1溫度分布之量測結果 31 4.2.2微流道熱能帶走比例 39 4.2.3微流道之對流熱傳係數 41 4.3系統的能量平衡 45 第五章結論與未來展望 52 5.1結論 52 5.2未來展望 53 參考文獻 54 | |
dc.language.iso | zh-TW | |
dc.title | 奈米流體在不同外型微流道中的對流熱傳實驗研究 | zh_TW |
dc.title | Experimental study of heat convection of nanofluids in
micro channels with different geometries | en |
dc.type | Thesis | |
dc.date.schoolyear | 103-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 沈弘俊(Horn-Jiunn Sheen),陽政穎(Cheng-ying Yang) | |
dc.subject.keyword | 二氧化鈦-水奈米流體,微流道,強制熱對流,流道形狀,估計熱散失, | zh_TW |
dc.subject.keyword | TiO2-water nanofluids,micro channels,forced convection,channel shape,heat loss estimation, | en |
dc.relation.page | 57 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2015-08-11 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 應用力學研究所 | zh_TW |
顯示於系所單位: | 應用力學研究所 |
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