Effect of viscous dissipation on laminar mixed convection in a horizontal double-passage channel with uniform wall heat flux

Abstract

The effect of viscous dissipation on fully developed laminar mixed convection in a horizontal double-passage channel has been investigated analytically. The channel is divided into two passages by means of a thin, perfectly conductive plane baffle and the walls have different uniform heat fluxes. Velocity and temperature profiles and the Nusselt number on the hot wall have been determined in closed forms. Results show that the Brinkman number has a significant effect on the dimensionless temperature, specially when the baffle is near to any of the channel's walls. The variations of the Nusselt number on the hot wall with Brinkman number depends on the baffle position.