Heat flux and slip effects on liquid flow in a microchannel

In this study, the liquid flow with the slip boundary condition in a microchannel between two parallel plates with imposed heat flux was numerically investigated. The combined effect of pressure-driven flow and electro-osmosis was taken into account. Electric potential, liquid flow and thermal characteristics were determined using the Poisson-Boltzmann, the modified Navier-Stokes and the energy equations for a hydrodynamical and thermal steady fully developed laminar flow for an incompressible liquid. The results demonstrate the influence of the slip coefficient, the heat flux and the pressure difference on flow velocity, local temperature and Nusselt number. A comparison of the developed model results with those in a previous study was made. (c) 2007 Elsevier Masson SAS. All rights reserved.