カスタマーログイン ショッピングカート
ライブラリ登録: Guest
ホーム アーカイブ Thermal Letter 役員 今後の会合 国際伝熱会議の集会
International Heat Transfer Conference 12
2002, 18-23 August, Grenoble, France

Gas Flow Through Smooth And Rough Microchannels

Get access DOI: 10.1615/IHTC12.4040
6 pages

要約

In this paper we present experimental measurements of friction factor for gas flow through rectangular crosssection microchannels. (100) and (110) silicon wafers were used to fabricate microchannels with smooth and rough surfaces, respectively. The instrumentation includes local pressure measurement along the microchannel length to determine the axial pressure profile. Sensors to directly measure the microchannel surface temperature are currently under development to enable calculation of the local convection heat transfer coefficient. The microchannels are etched into silicon wafers, capped with smooth glass, and have hydraulic diameters between 4 and 100-microns. All measurements were made in the laminar flow regime with Reynolds numbers ranging from 0.1 to 1000. The objective of the investigation is to (1) verify the continuum based predictions of friction factor for large microchannels; (2) determine if the friction factor is dependent on the surface roughness for microscale flows; and (3) identify the Knudsen number (ratio of mean free path to channel depth) at which the friction factor begins to deviate from continuum behavior.
ホーム アーカイブ Thermal Letter 役員 今後の会合 国際伝熱会議の集会 English Русский 中文 Português Spain French German ヘルプ 問合せ先 Begell Houseへ戻る