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题名: Prediction of a temperature-dependent electroosmotically driven microchannel flow with the Joule heating effect
作者: W. H. Sheu
S. H. Kuo
R. K. Lin
贡献者: 國立臺灣海洋大學:輪機工程學系
日期: 2012-06
上传时间: 2018-09-07T01:20:03Z
出版者: International Journal of Numerical Methods for Heat and Fluid Flow
摘要: Abstract: Purpose ‐ A convection-diffusion-reaction scheme is proposed in this study to simulate the high gradient electroosmotic flow behavior in microchannels. The equations governing the total electric field include the Laplace equation for the effective electrical potential and the Poisson-Boltzmann equation for the electrical potential in the electric double layer. Design/methodology/approach ‐ Mixed electroosmotic/pressure-driven flow in a straight microchannel is studied with the emphasis on the Joule heat in the equations of motion. The nonlinear behaviors resulting from the hydrodynamic, thermal and electrical three-field coupling and the temperature-dependent fluid viscosity, thermal conductivity, electrical permittivity, and conductivity of the investigated buffer solution are analyzed. Findings ‐ The solutions computed from the employed flux discretization scheme for the hydrodynamic, thermal and electric field equations have been verified to have good agreement with the analytical solution. Parametric studies have been carried out by varying the electrical conductivity at the fixed zeta potential and varying the zeta potential at the fixed electrical conductivity. Originality/value ‐ Investigation is also addressed on the predicted velocity boundary layer and the electric double layer near the negatively charged channel wall.
關聯: 22(5)
显示于类别:[輪機工程學系] 期刊論文


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