Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/2102
DC FieldValueLanguage
dc.contributor.advisor簡瑞與zh_TW
dc.contributor.advisorReiyu Cheinen_US
dc.contributor.author蕭邦佶zh_TW
dc.contributor.authorHsiao, Pang Chien_US
dc.date2001zh_TW
dc.date.accessioned2014-06-05T11:42:30Z-
dc.date.available2014-06-05T11:42:30Z-
dc.identifier.urihttp://hdl.handle.net/11455/2102-
dc.description.abstract本研究主要目的乃探討氣體在平板微流道中,流動與熱傳的特性。氣體流動由入出口之壓力差來驅動,在流場為層流的範圍內,探討可壓縮性及稀薄效應對氣流與熱傳之影響。 在氣體流動方面,在假設流場為全展之等溫流場時,本研究所得之微流道壓力分佈及速度分佈,與Arkilic et al.(1997)之理論解完全一致。此外,利用質量守恒之觀點,本研究亦得到流量,入出口壓力比,以及管長間之關係式。 在熱傳方面,在假設氣流為不可壓縮時,等壁熱通量及等壁溫度之Graetz問題延伸至探討稀薄效應對熱傳之影響。結果發現,在此兩種條件下,熱全展所需之長度皆較傳統熱傳預測值來得高,且熱傳係數Nu在熱全展時,隨入口Kn數之增加而降低。此外,當考慮氣體壓縮性及稀薄效應時,發現Nu值為管長之函數,在較高之入出口壓力比時,可得較高之Nu值分佈。zh_TW
dc.description.abstractThe major purpose of present study is to investigate the characteristics of flow and heat transfer in a microchannel. The fluid drived by difference pressure at inlet and outlet in laminar flow to investigate compressibility and rarefaction to case the effect of gas flow and heat transfer. In flow, the fluid is assumed to be fully-developed and constant temperature. The investigation shows that the pressure distribution and velocity distribution are the same as Arkilic et al.(1997). Furthermore, the present study employs conservation of mass viewpoint, get the relationship between mass flow rate, inlet/outlet pressure ratio, and the length of microchannel. In heat transfer, the fluid is assumed to be incompressible, the present study is Graetz problem extended to the effect of rarefaction at constant heat flux and constant wall temperature. The investigation shows that the length of thermal fully-developed is longer than traditional heat transfer expected, and Nusselt numbers are decrease with increasing Knudsen number. Furthermore, the study gains Nusselt numbers are function of length of microchannel, and higer Nusselt numbers distribution at higer inlet/outlet pressure ratio when consider effects of compressibility and rarefaction.en_US
dc.description.tableofcontents中文摘要………………………………………………………………………I 英文摘要………………………………………………………………………II 目錄………………………………………………………………………… III 圖表目錄…………………………………………………………………… IV 符號說明………………………………………………………………… V 第一章 緒論……………………………………………………………… 1 1.1 前言…………………………………………………………………… 1 1.2 研究動機…………………………………………………………………5 第二章 理論模式…………………………………………………………… 7 第三章 氣體於微流道中之流動…………………………………………… 9 第四章 微管道中之熱傳……………………………………………………14 4.1 等壁溫平板微流道熱傳分析……………………………………… 17 4.1.1 不考慮壓力變化等壁溫平板微流道之熱傳……………………… 18 4.1.2 考慮壓力變化對等壁溫微流道熱傳之影響……………………… 23 4.2 等壁熱通量平板微流道熱傳分析…………………………………… 25 4.2.1 不考慮壓力變化等壁熱通量平板微流道之熱傳………………… 26 4.2.2 考慮壓力變化對等壁熱通量微流道熱傳之影響…………… 29 第五章 結果與討論………………………………………………………… 30 5.1 平板微流道壓力與速度分佈…………………………………………30 5.2 平板微流道熱傳分析…………………………………………………32 5.2.1 等壁溫平板微流道熱傳分析……………………….……………… 32 5.2.2 等壁熱通量平板微流道熱傳分析……………………………………33 第六章 結論與建議………………………………………………………… 36 參考文獻………………………………………………………………………38zh_TW
dc.language.isoen_USzh_TW
dc.publisher機械工程學系zh_TW
dc.subjectmicrochannelen_US
dc.subject微流道zh_TW
dc.subjectgasen_US
dc.subjectflowen_US
dc.subjectheat transferen_US
dc.subject氣體zh_TW
dc.subject流場zh_TW
dc.subject熱傳zh_TW
dc.title微流道氣流流場與熱傳分析zh_TW
dc.titleAnalysis of Gaseous Flow and Heat Transfer in Microchannelen_US
dc.typeThesis and Dissertationzh_TW
item.fulltextno fulltext-
item.languageiso639-1en_US-
item.openairetypeThesis and Dissertation-
item.cerifentitytypePublications-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.grantfulltextnone-
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