The efficiency of round channels fitted with porous, highly heat-conducting insert in a laminar fluid coolant flow at boundary conditions of the third kind

The accounts showed that the increase in the efficiency of porous channels occurs with decrease in the diameter of the channel, in the difference of temperatures of the environment and coolant at the beginning of the pipe, decrease in the Biot number, increase in the porosity, increase in the Reynolds numbers in the compared channel with a smooth wall and decrease in the relative length of compared channels with a smooth wall.