Electrokinetic Flow of an Electrolyte Solution in an Elliptical Microchannel Covered by an Ion-Penetrable Charged Membrane

• Main Authors: Weng Ying-Lun, 翁瑩倫
• Other Authors: Hsu Jyh-Ping
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/75878235207964576073

碩士 === 國立臺灣大學 === 化學工程學研究所 === 91 === The electrokinetic flow of an electrolyte solution in an elliptical microchannel covered by an ion-penetrable charged membrane layer is examined theoretically. The present analysis extends previous results in that a two-dimensional problem is considered. The system under consideration simulates the flow of a fluid, for example, in vein. The electroosmostic volumetric flow rate, the total electric current, the streaming potential, and the electroviscous effect of the system under consideration are evaluated. We show that, for a constant hydraulic diameter, the variations of these quantities as a function of the aspect ratio of the microchannel may have a local minimum or a local maximum at a medium level of ionic strength, which depends on the thickness of the membrane layer. For a constant cross-sectional area, the electroosmostic volumetric flow rate, the total electric current, and the streaming potential increase monotonically with an increase in the aspect ratio. The electroviscous effect decreases monotonically with an increase in the aspect ratio.