National Tsing Hua University Institutional Repository:Head loss and flow characteristics for turning flow driven by surface tension force inside open microchannel
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    National Tsing Hua University Institutional Repository > 原子科學院  > 工程與系統科學系 > 會議論文  >  Head loss and flow characteristics for turning flow driven by surface tension force inside open microchannel


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    题名: Head loss and flow characteristics for turning flow driven by surface tension force inside open microchannel
    作者: Chen, Y.F.;Chen, M.H.;Yu, R.J.;Tseng, F.G.;Chieng, Ching-Chang
    教師: 錢景常
    日期: 2004
    出版者: American Society of Mechanical Engineers
    關聯: Proceedings of the Second International Conference on Microchannels and Minichannels (ICMM2004), Proceedings of the Second International Conference on Microchannels and Minichannels (ICMM2004), 2004, p 439-444
    关键词: Heat losses
    Surface tension
    Interfaces
    Unsteady flow
    Viscosity
    Friction
    Pressure effects
    Computer simulation
    摘要: Present study demonstrates the head loss and the flow characteristics as the open microchannel makes turns. The microchannels are of various aspect ratios of depth/width ranging from 0.5 to 2. and makes turns with different angles ranging from 60 to 120 degrees. The investigations are performed both by experiments and numerical simulations based on first principle equations. For the open channel system, the flow is mainly driven by surface tension under same pressure atmosphere. For liquid flow in open microchannel without turn, the liquid front velocity decreases but the interface area of liquid-gas increase as flow moves downstream. For turning flows, liquid front velocity is decreased firstly and then increased sharply at the turning point. Furthermore, the liquid front velocity can be increased for higher aspect ratio of channel height and width, and the effect of aspect ratio is significant up to aspect ratio between 1.0-1.5. Detailed flow characteristics as well as the head loss coefficient due to microchannel turning are discussed.
    URI: http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=ASMECP002004041642000439000001&idtype=cvips&gifs=yes&ref=no
    http://www.asme.org/
    http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/47206
    显示于类别:[工程與系統科學系] 會議論文

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