Pool boiling heat transfer on micro-fins with wire mesh - Experiments and heat flux prediction

A simplified model was proposed for determining the total heat flux for micro-fins with the wire mesh. It was assumed that the structure formed a system of connected perpendicular horizontal tunnels limited with a porous top covering. Regarding the calculated bubble parameters (diameter, nucleation sites density, frequency), the heat fluxes were determined for the evaporation in the tunnels between the micro-fins and for the convection on the wire mesh surface. The predicted heat fluxes, when compared to the experimental results, showed satisfactory agreement for boiling water at medium and high heat fluxes (range from 70 to 355 kW/m2). Less accurate results were obtained for ethanol and FC-72.