On thermal boundary layer of a non-Newtonian fluid on a power-law stretched surface of variable temperature with suction or injection

Heat transfer characteristics of a non-Newtonian fluid on a power-law stret ched surface of variable temperature with suction or injection were investi gated. Similarity solutions of the laminar boundary layer equations describ ing heat transfer and fluid flow in a quiescent fluid were obtained and sol ved numerically. Velocity and temperature profiles as well as the Nusselt n umber, Nu, were studied for two thermal boundary conditions; uniform surfac e temperature and variable surface temperature, for different parameters; P randtl number Pr, temperature exponent b, velocity exponent m, injection pa rameter d and power-law index n. It was found that decreasing injection par ameter d, and power-law index n and increasing Prandtl number Pr and surfac e temperature exponent b enhance the heat transfer coefficient.