Abstract
This article inspects the role of wall asymmetric heat fluxes and buoyant force on steady natural convection flow in a vertical microchannel with electrokinetic effect. The governing Poisson–Boltzmann, momentum and energy equations representing the electric potential, velocity profile and temperature distribution in the microchannel are obtained for the current investigation. Using the Debye–Huckel linearization, exact solutions for electric potential, velocity and temperature are found by method of undetermined coefficients and direct integration. In the course of graphical simulations, result shows that the skin-friction and mass flow rate in the microchannel would have been overestimated by approximately 37% and 30% respectively if the slip-condition at the microchannel walls for current investigation had not been taken into consideration regardless of the magnitude of buoyant force. In addition, the inclusion of buoyancy parameter acts as an enhancer on velocity profile and mass flow rate.
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