Boiling of a Liquid on Microstructured Surfaces Under Free-Convection Conditions

The authors have shown the possibilities of replacing complex and expensive technologies of manufacture of nanorough, microrough, and porous materials for boiling surfaces by a simple and resource-saving technique of mechanical treatment of surfaces: by the strain-cutting method. It has been established that the maximum levels of heat-transfer intensification (as high as four to six times) during the boiling of distilled water and increase (of six times) in the critical heat fluxes are inherent in surfaces obtained by the strain-cutting method with three-dimensional microfinning with spacings of width 120–180 μm at a height of fins of 340–570 μm and their longitudinal spacing of 240–400 μm.