https://scholars.lib.ntu.edu.tw/handle/123456789/61244
標題: | Electrophoresis of a rigid sphere in a Carreau fluid normal to a planar surface | 作者: | Lee, Eric Chen, Chi-Tien Lee E. |
關鍵字: | Electrophoresis;Boundary effect;Sphere normal to plane;Non-Newtonian fluid;Carreau model | 公開日期: | 2005 | 出版社: | Taipei:National Taiwan University Dept Chem Engn | 起(迄)頁: | - | 來源出版物: | Journal of Colloid and Interface Science 285(2005), 857â 864 | 摘要: | The boundary effect on electrophoresis is investigated by considering the electrophoresis of a spherical particle in a non-Newtonian fluid normal to a planar surface under conditions of low surface potential and weak applied electric field. The Carreau model, which is widely used for the description of polymeric fluids of shear-thinning nature, is adopted to simulate the non-Newtonian behavior of the fluid. We show that, in general, shear thinning has the effect of raising the electrophoretic mobility of a particle. The thinner the double layer, the more significant this effect is, and, since the presence of the planar surface has the effect of enhancing the shear-thinning effect, the closer a particle is to the planar surface, the larger is its mobility. Both the shear rate and the viscosity of the fluid vary most significantly in the gap between the particle and the planar surface, and the maximal shear rate and the minimal viscosity occur on the particle surface. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/2006111501275382 | 其他識別: | 246246/2006111501275382 | DOI: | 10.1016/j.jcis.2004.12.014 |
顯示於: | 化學工程學系 |
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