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    题名: The Friction Characteristics of Gaseous Slip Flow in Microtubes
    其它题名: 微圓管滑動氣體流場摩擦特性之探討
    作者: 陳慶祥;Chen, Ching-shung;康尚文;Kang, Shung-wen;郭維仁;Kuo, Wei‐jen
    贡献者: 淡江大學航空太空工程學系
    关键词: 滑動流;微流道;微機電系統 Slip flow;Microtube flow;MEMs
    日期: 2001-09
    上传时间: 2013-07-11 11:55:59 (UTC+8)
    出版者: Taipei : Chinese Institute of Chemical Engineers
    摘要: The present work studies the friction characteristics of gaseous
    slip flow in microtubes. The reduced diameter of microtubes has significant
    influences on the flow. The degree of influence depends on
    the Knudsen number. If the Knudsen number is in the range of 10−3 to
    0.1, the fluid can be assumed to be a continuum but a slip boundary
    condition at the tube wall has to be employed to account for the incomplete
    tangential momentum and energy exchanges between the gas molecules
    and the wall. Although slip flow in microtubes can be investigated
    by solving numerically the compressible Navier-Stokes equations,
    the hyperbolic-parabolic character of the equations makes it very
    inefficient. The very large length to diameter ratio of microtube flows
    suggests that they can be predicted accurately as well as efficiently by
    solving the compressible boundary-layer equations. The parabolic character
    of the boundary-layer equations renders the present method a very
    efficient and accurate tool in studying slip flows. The results confirm
    the findings of earlier investigators that the product of f . Re is smaller
    for laminar microtube flows than that predicted by the conventional
    theory when the flow is in the slip region.
    關聯: Journal of the Chinese Institute of Engineers=中國工程學刊 24(5), pp.641-647
    DOI: 10.1080/02533839.2001.9670661
    显示于类别:[國際事務與戰略研究所] 專利
    [航空太空工程學系暨研究所] 期刊論文

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