Two models for heat transfer through porous fin (metal-foam)

The effect of radiation losses on the natural convectionheat transfer from metal-foam of concave parabolicprofile is analytically and numerically studied in thispaper. Two models, with and without effect of radiation,are introduced based on using energy balance andDarcy’s model to formulate the heat transfer equation.Air and Aluminum are employed as the cold fluid andporous medium, respectively, and the effects ofradiation, Rayleigh number(Ra) and porosity on the heattransfer rate are studied in detail. The results show that,as Ra increases the heat transfer rate increases.Furthermore, as porosity increases (much than ) theheat transfer rate increases

کلیدواژه ها:

Radiation ، Darcy model ، porosity ، metalfoam ، Aluminum