Abstract
This study presents a numerical analysis of electrokinetic mass transport in a microchannel with Joule heating effects. A nonuniform electric field caused by the presence of the Joule heating is considered in the model development. Numerical computations for electrokinetic mass transport under Joule heating effects are carried out using the Crank-Nicolson scheme of second-order accuracy in space and time for two different cases: (i) the translating interface and (ii) the dispersion of a finite sample plug. The simulations reveal that the presence of Joule heating not only causes the sample species to transport faster, but also causes the sample peak to decrease and the sample band to deviate from its flat interface or pluglike shape.
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