Heat transfer on a capillary-porous surface during evaporation / boiling of a thin layer of liquid at low pressures

Abstract

Abstract This paper presents experimental data on heat transfer during the evaporation/boiling of n-dodecane on a surface with a capillary-porous coating in a wide pressure range. The obtained data are compared with data on heat transfer during the evaporation/boiling of n-dodecane on a smooth surface. It was found that the regime of bubble boiling occurs on a coated surface at lower pressures than on a smooth surface. It was found that enhanced heat transfer during evaporation/boiling on a capillary-porous surface as compared with a smooth surface is observed only under conditions of bubble boiling (P ≥ 103 Pa).