In the present paper, the eects of viscous dissipation, the boundary condition assumptions, thermal dispersion, particle diameters and the variable properties of oil on convection heat transfer are analyzed using a numerical model including thermal nonequilibrium assumption. The results, which are compared with experimental data, show that the convection heat transfer in porous media can be predicted numerically using the thermal non-equilibrium model with the ideal constant wall heat Β―ux boundary condition. Viscous dissipation weakens the convection heat transfer from the Β―uid to the wall in the porous media. However, under practical conditions the inΒ―uence of viscous dissipation on the convection heat transfer is small. The Β―uid temperature in the bottom part of the channel is higher than in the core region of the channel when the lower plate is adiabatic due to the eect of viscous dissipation. The variation of the thermal physical properties of oil has a profound inΒ―uence on the convection heat transfer coecient, which increases as the heat Β―ux increases. When the upper and lower plates are heated with the same heat Β―ux, the convection heat transfer coecient on the upper plate surface is higher than when one side is heated and the other is insulated. However, the dierences caused by these two kinds of boundary conditions in porous media are less than that in an empty channel.