Analytic study on laminar electroosmotic flow in special-geometry microchannels under zero gravity
首发时间:2009-04-09
Abstract:Electroosmotic flow (EOF) is an effctive way for pumping, separating and mixing fluids in microfluidics. In this paper the characteristics of EOF in microchannels with special-designed geometry are investigated. By using the bilinear method and symbolic computation, the complete analytic solutions to the two-dimensional Poisson-Boltzmann equation and Navier-Stokes equation under certain assumptions are obtained, which can be applied to model the electrical double layer 痚ld and the flow 痚ld. Based on the analytic solutions, the influence factors on the velocity 痚ld and the volumetric flowrate,including the channel cross-section, ionic concentration and applied electric 痚ld strength,are taken into consideration. These results might provide valuable insights into the opti-mal design of microchannel geometry to achieve flow control in relevant applications.
keywords: Electroosmotic flow Microchannel Electrical double layer Bilinear method
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Analytic study on laminar electroosmotic flow in special-geometry microchannels under zero gravity
摘要:Electroosmotic flow (EOF) is an effctive way for pumping, separating and mixing fluids in microfluidics. In this paper the characteristics of EOF in microchannels with special-designed geometry are investigated. By using the bilinear method and symbolic computation, the complete analytic solutions to the two-dimensional Poisson-Boltzmann equation and Navier-Stokes equation under certain assumptions are obtained, which can be applied to model the electrical double layer 痚ld and the flow 痚ld. Based on the analytic solutions, the influence factors on the velocity 痚ld and the volumetric flowrate,including the channel cross-section, ionic concentration and applied electric 痚ld strength,are taken into consideration. These results might provide valuable insights into the opti-mal design of microchannel geometry to achieve flow control in relevant applications.
关键词: Electroosmotic flow;Microchannel;Electrical double layer;Bilinear method
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Analytic study on laminar electroosmotic flow in special-geometry microchannels under zero gravity
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