Phase Change Phenomena on Superhydrophilic and Super-Water-Repellent Surfaces

摘要

Effects of surface wettability on phase change phenomena have been studied in wide range of contact angles using superhydrophilic(SH) and super-water-repellent(SWR) surfaces. In pool boiling, critical heat flux(CHF) and minimum heat flux(MHF) increase with the decrease in contact angle. Wetting limit temperature of water drop on heated surface increases with the decrease in contact angle. In pool boiling on SWR surface, bubble nucleation and film boiling occur in extremely small superheating.