effects of viscous dissipation on forced convective heat transfer in a channel embedded in a power-law fluid saturated porous medium

the convective heat transfer analysis in a channel embedded in a power-law fluid saturated porous medium subject to uniform heat flux is presented and compared with a newtonian fluid concerning the effects of viscous dissipation. governing momentum and energy equations for non-newtonian fluids which accounts for the viscous dissipation effects are solved numerically. the temperature profiles of the non-newtonian fluids are found to relate closely to the velocity profiles. when viscous dissipation is taken account of, nusselt numbers for non-newtonian fluid are found to deviate more from newtonian fluid with increasing brinkman number for a certain range of the darcy number.