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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/49997

Title: Prediction of a temperature-dependent electroosmotically driven microchannel flow with the Joule heating effect
Authors: W. H. Sheu
S. H. Kuo
R. K. Lin
Contributors: 國立臺灣海洋大學:輪機工程學系
Date: 2012-06
Issue Date: 2018-09-07T01:20:03Z
Publisher: International Journal of Numerical Methods for Heat and Fluid Flow
Abstract: 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.
Relation: 22(5)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/49997
Appears in Collections:[輪機工程學系] 期刊論文

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