淡江大學機構典藏:Item 987654321/65311
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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/65311


    Title: Flow Characteristics of Three-Dimensional Microscale Backward-Facing Step Flows
    Authors: Hsieh, Tes-Yang;Hong, Zuu-Chang;Pan, Ying-Che
    Contributors: 淡江大學機械與機電工程學系
    Date: 2010-02
    Issue Date: 2011-10-20 21:39:10 (UTC+8)
    Publisher: Philadelphia: Taylor & Francis Inc.
    Abstract: The flow in three-dimensional (3-D) microscale backward-facing step is investigated using the direct simulation Monte Carlo method. To ensure the rationality of two-dimensional (2-D) simplification for a 3-D structure, the flow characteristics of the 3-D microscale backward-facing step flows with various cross-section aspect ratios are compared with those of 2-D simplification. When the cross-section aspect ratio of 3-D flow cases is greater than 5, the approaching level of 3-D flows to 2-D simplification is over 98% for the nitrogen flow with inlet Knudsen number (Kn) of 0.04. Moreover, it is found that the approaching level decreases as Kn increases. The dependence between the vortex stability and the cross-section aspect ratio is studied. It is found that the flow separation, recirculation, and reattachment will disappear as the cross-section aspect ratio is less than 1 for flows with inlet Kn of 0.04.
    Relation: Numerical Heat Transfer, Part A: Applications 57(5), pp.331-345
    DOI: 10.1080/10407780903582992
    Appears in Collections:[Graduate Institute & Department of Mechanical and Electro-Mechanical Engineering] Journal Article

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