https://scholars.lib.ntu.edu.tw/handle/123456789/408532
Title: | Sedimentation of concentrated charged spheres at low surface potentials | Authors: | Chih M.-H. Lee E. Chu J.-W. Hsu J.-P. |
Issue Date: | 2000 | Journal Volume: | 16 | Journal Issue: | 4 | Start page/Pages: | 1650-1654 | Source: | Langmuir | Abstract: | The sedimentation of concentrated charged spherical particles in an electrolyte solution is investigated theoretically for an arbitrarily thick double layer taking the effect of double-layer polarization into account. We show that the ratio E*/U* (=scaled sedimentation potential per scaled sedimentation velocity) is a constant if £ea is either very small or very large, £e and a being respectively the reciprocal Debye length and the radius of a particle. The variation of E*/U* as a function of £ea has a minimum at a medium £ea. This minimum increases with the increase in particle concentration. The scaled sedimentation velocity approaches a constant if £ea is small, and its variation as a function of £e£\ has a maximum at a medium £ea. This maximum decreases with the decrease in particle concentration. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408532 | ISSN: | 07437463 | DOI: | 10.1021/la9908992 |
Appears in Collections: | 化學工程學系 |
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