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    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/58805

    题名: Translation of two coaxial, nonhomogeneously structured flocs normal to a plate
    作者: Hsu, Jyh-Ping;Yeh, Shu-Jen;Yeh, Li-Hsien;Tseng, Shio-Jenn;Chen, Chur-Jen
    贡献者: 淡江大學數學學系
    关键词: Sedimentation;Flocs;Nonhomogeneously structured;Boundary effect;Two flocs normal to plate;Drag
    日期: 2008-12
    上传时间: 2011-10-01 21:12:30 (UTC+8)
    出版者: Heidelberg: Springer
    摘要: The translation of two identical, coaxial, nonhomogeneously structured flocs in a Newtonian fluid normal to a plate is analyzed theoretically for the case where the Reynolds number ranges from 0.1 to 40. The geometry considered is capable of simulating the behavior of a floc near a boundary when other flocs may present. The description of the structure of a floc is based on a two-layer model where the permeability of its inner layer can be different from that of its outer layer. We show that the influence of the plate on the flow field near the near floc is more significant than that near the far floc, but the behavior of the corrected drag coefficient of the far floc is more complicated than that of the near floc. In general, the presence of the plate has the effect of raising the drag on a floc. The more nonhomogeneous the floc structure is, the more appreciable the deviation of the corrected drag coefficient–Reynolds number curve from the corresponding Stokes’ law-like relation. An empirical relation, which correlates the corrected drag coefficient with the Reynolds number, the separation distance between two flocs, the floc–floc distance, and the ratio permeability of outer layer to permeability of inner layer, is proposed.
    關聯: Colloid and Polymer Science 286(14-15), pp.1593-1604
    DOI: 10.1007/s00396-008-1931-x
    显示于类别:[數學學系暨研究所] 期刊論文


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