Enhanced cooling via boiling in porous layers: The effect of vapor channels

Enhanced heat transfer via boiling in a porous lager covering the heated su rface is considered analytically. The effect of vapor channels traversing t he porous layer on the power for which a vapor film on the heated surface o ccurs, is examined by comparing the heat removal capability of the system w ith and without channels. A significant increase of the attained coolabilit y level is obtained theoretically leading to the possibility of new design configurations for the cooling of intensely heated surfaces.