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    题名: Drag on a sphere in a spherical dispersion containing carreau fluid
    作者: Hsu, J. P;Yeh, S. J;曾琇瑱;Tseng, S
    贡献者: 淡江大學數學學系
    关键词: Drag coefficient;Spherical dispersion;Unit cell model;Carreau fluid
    日期: 2008-12-01
    上传时间: 2010-08-09 16:41:39 (UTC+8)
    出版者: Elsevier
    摘要: The drag on a rigid sphere in a spherical dispersion containing Carreau fluid is investigated theoretically based on a free surface cell model for Reynolds number in the range [0.1,100], Carreau number in the range [0,10], the power-law index in the range [0.3,1], and the void fraction in the range [0.271,0.999]. The influences of the particle concentration, the nature of the Carreau fluid, and Reynolds number, on the drag coefficient are examined. We show that the drag coefficient declines with the decreasing particle concentration, and the reversal of the flow field in the rear region of a sphere is enhanced by the shear-thinning nature of the fluid. An empirical relation, which correlates the drag coefficient with the void fraction (= 1 − particle concentration), the nature of the Carreau fluid, and Reynolds number, is proposed.
    關聯: Powder Technology 188(1), pp.34-41
    DOI: 10.1016/j.powtec.2008.03.014
    显示于类别:[數學學系暨研究所] 期刊論文

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