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    題名: Residence Time Distribution for Electrokinetic Flow through a MicrochannelComprising a Bundle of Cylinders
    作者: Hsu, Jyh-ping;Ting, Chung-Chieh;Lee, Duu-Jong;曾琇瑱;Tseng, Shio-jenn;Chen, Chur-Jen;Su, Ay
    貢獻者: 淡江大學數學學系
    日期: 2007-03-01
    上傳時間: 2010-01-28 07:11:49 (UTC+8)
    出版者: Elsevier
    摘要: The electrokinetic flow of an electrolyte solution through a microchannel that comprises a bundle of cylinders is investigated for the case of constant surface potential. The system under consideration is simulated by a unit cell model, and analytical expressions for the flow field and the corresponding residence time distribution under various conditions are derived. These results are readily applicable to the assessment of the performance of a microreactor such as that which comprises a bundle of optical fibers. Numerical simulations are conducted to investigate the influences of the key parameters, including the thickness of the double layer, the strength of the applied electric field, the magnitude of the applied pressure gradient, and the characteristic sizes of a microchannel, on the residence time distribution. We show that the following could result in a shorter residence time: thin double layer, strong applied electric field, large applied pressure gradient, and small number of cylinders. Based on the thickness of the double layer, criteria are proposed for whether the flow field can be treated as a laminar flow or as a plug flow, two basic limiting cases in reactor design.
    關聯: Journal of Colloid and Interface Science 307(1), 265-271
    DOI: 10.1016/j.jcis.2006.11.021
    顯示於類別:[數學學系暨研究所] 期刊論文

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