Numerical investigation of Joule heat effect on the electroosmotic flow motion in microchannels
Date Issued
2008
Date
2008
Author(s)
Kuo, Sheng-Hsiu
Abstract
In this study, a convection-diffusion-reaction schemes applied to solve the transient transport equations for therediction of steady electroosmotic microchannel flow behavior. Theoverning equations for the total electric field include the Laplacequation for the effective electrical potential and theoisson-Boltzmann equation for the electrical potential in thelectric double layer. The transport equations governing theydrodynamic field variables comprise the mass conservation equationor the electrolyte and the equations of motion for thencompressible charged fluid flow subject to an electroosmotic bodyorce.n two dimensional model, one of the main aims of the current study is to elucidate the effectf Joule heating, which can affect the electrohydrodynamic behavior.nvestigation into the region near the negatively charged channelall will be made through the simulated velocity boundary layer,iffuse layer and the electric double layer.he other is to elucidate the energy generation due toJoule heating, which can affect the electrohydrodynamic behavior,for the cases investigated at different ionic conductivities and wall zeta potentials.his paper reports 3D numerical analysis of the Joule heating and its effects on the electrokineticransport of solutes in a simple rectangular microchannels.
Subjects
convection-diffusion-reaction
electroosmotic flow
electric double layer
Type
thesis
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