| Summary: | 碩士 === 國立臺灣大學 === 工程科學及海洋工程學研究所 === 96 === In this study, a convection-diffusion-reaction scheme
is applied to solve the transient transport equations for the
prediction of steady electroosmotic microchannel flow behavior. The
governing equations for 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. The transport equations governing the
hydrodynamic field variables comprise the mass conservation equation
for the electrolyte and the equations of motion for the
incompressible charged fluid flow subject to an electroosmotic body
force.
In two dimensional model, one of the main aims of the current study is to elucidate the effect
of Joule heating, which can affect the electrohydrodynamic behavior.
Investigation into the region near the negatively charged channel
wall will be made through the simulated velocity boundary layer,
diffuse layer and the electric double layer.
The other is to elucidate the energy generation due to
Joule heating, which can affect the electrohydrodynamic behavior,
for the cases investigated at different ionic conductivities and wall zeta potentials.
This paper reports 3D numerical analysis of the Joule heating and its effects on the electrokinetic
transport of solutes in a simple rectangular microchannels.
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