https://scholars.lib.ntu.edu.tw/handle/123456789/63922
Title: | 密集膠體球形粒子中之沈降電位探討 Sedimentation potential of a concentrated spherical colloidal suspension |
Authors: | 李克強 | Keywords: | 電泳;電位;電集層極化;懸浮溶液 | Issue Date: | 2000 | Publisher: | 臺北市:國立臺灣大學化學工程學系暨研究所 | Abstract: | The sedimentation behavior of a concentrated suspension of charged spherical particles is investigated theoretically. The sedimentation potential is evaluated taking the effect of double layer polarization into account. A cell model is adopted to describe thepresent multientities system, and a pseudo-spectral numerical scheme is used to solve the governing electrokinetic equations, which comprise a Navior-Stoked equation for flow field and a Poisson equation for electric field. Several interesting phenomena, which are absent if double layer polarization is neglected, are observed. For example, the atio(E*/U*), E* and U* being respectively the scaled sedimentation potential has a minimum if the electrical potential is low, and has a maximum if it is high. 本研究為了解帶電密集膠體溶液之沈降理論,在本研究中考慮了電集層橿化效應,使用細胞模式來描述多顆粒子之系統,使用假光譜法來求解主控電動方程式,其中有流場之Navior-Stokes方程式,電場之Poisson方程式,發現了一些有趣的現象,如沈降電位在表面電位小時有最小值,而在表面電位大時有最大值。 |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/9234 | Other Identifiers: | 892214E002003 | Rights: | 國立臺灣大學化學工程學系暨研究所 |
Appears in Collections: | 化學工程學系 |
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892214E002003.pdf | 638.67 kB | Adobe PDF | View/Open |
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