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    题名: Sedimentation of a cylindrical particle in a Carreau fluid
    作者: Hsu, Jyh-ping;Shie, Ching-Feng;曾琇瑱;Tseng, Shio-jenn
    贡献者: 淡江大學數學學系
    关键词: Sedimentation;Cylindrical particle;Carreau fluid;Drag coefficient
    日期: 2005-06-01
    上传时间: 2010-01-28 07:11:46 (UTC+8)
    出版者: Elsevier
    摘要: The drag coefficient of an isolated, rigid cylindrical particle in a Carreau fluid is evaluated. The result of numerical simulation reveals that, in general, the shear-thinning nature of a Carreau fluid yields a drag coefficient smaller than that for the corresponding Newtonian fluid. Also, the smaller the Reynolds number, the more appreciable the decrease of the drag coefficient as the relaxation time constant of the Carreau fluid increases. The influence of the index parameter of a Carreau fluid on the drag coefficient depends largely on the magnitude of the relaxation time constant and is insensitive to the Reynolds number. Only if the relaxation time constant is sufficiently large is the influence of the index parameter on the drag coefficient significant. If the Reynolds number and/or the relaxation time constant is sufficiently large, the flow field upstream of a particle becomes asymmetric to that downstream. In general, the influence of the index parameter, the relaxation time constant, and the Reynolds number on the flow field follows the order index parameter < relaxation time constant < Reynolds number.
    關聯: Journal of Colloid and Interface Science 286(1), pp.392-399
    DOI: 10.1016/j.jcis.2005.01.041
    显示于类别:[數學學系暨研究所] 期刊論文

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