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    题名: Drag force on a rigid spheroidal particle in a cylinder filled with carreau fluid
    作者: Hsu, Jyh-ping;Hsieh, Yu-Heng;曾琇瑱;Tseng, Shio-jenn
    贡献者: 淡江大學數學學系
    关键词: Wall effect;Spheroid in cylinder;Drag correction factor;Drag coefficient;Carreau fluid;Flow separation
    日期: 2005-04-15
    上传时间: 2010-01-28 07:11:41 (UTC+8)
    出版者: Elsevier
    摘要: The boundary effect on the drag acting on a rigid particle is investigated by considering a spheroid on the axis of a cylinder filled with a Carreau fluid. The result of numerical simulation reveals that the ratio (drag coefficient in Carreau fluid/drag coefficient in Newtonian fluid) has a maximum as the ratio (semiaxis in radial direction/radius of cylinder) varies. The presence of a wall has the effect of enhancing the convective motion in the rear part of a particle, and therefore, the formation of wakes. The influence of the shape of a particle on the drag force acting on it can be decreased either by increasing the shear-thinning effect of the fluid or by increasing the Reynolds number. The Reynolds number at which flow separation occurs is found to increase roughly linearly with the increase in the power-law exponent of the Carreau fluid.
    關聯: Journal of Colloid and Interface Science 284(2), pp.729-741
    DOI: 10.1016/j.jcis.2004.08.124
    显示于类别:[數學學系暨研究所] 期刊論文


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