Abstract
Cooling technique that applies nano-porous structure on a heat transfer surface is verified to enhance boiling heat transfer due to its highly enhanced wettability. Evaluating several different techniques to assemble the nano-particles clarified that the boiling adhesion method was the most available. The surface structure has not only the nano scale of pore but also newly peculiar micro pore structures. The contact angle of a droplet on the nano-porous structure mentioned above becomes about 0 degrees, which indicates that the wettability between the water and the nano-porous structure is drastically improved. Furthermore, the dynamic behavior of the droplet on the high temperature plate with the nano-porous structure is visualized with a high speed video camera, which shows that the droplet intensely boils and evaporates on the nano-porous surface and disappears instantaneously under Leidenfrost conditions.
