Investigations on the pool boiling heat transfer and critical heat flux of ZnO-ethylene glycol nanofluids

Surfactant free and fairly stable ZnO-ethylene glycol (EG) nanofluids are prepared using prolonged sonication (>60 h). Extended period of sonication results in superior fragmentation and dispersion of ZnO nanoparticles, as is evident from the DLS data. Thermal conductivity of the prepared nanofluid displays a maximum enhancement of 40% for 3.75% volume fractions of ZnO loading in EG at 30 °C. The nucleate pool boiling heat transfer...