THE NUMERICAL ANALYSIS OF BUBBLE GROWTH AND BUBBLE FREQUENCY IN NUCLEATE BOILING USING NANOFLUIDS

The nucleate boiling phenomena is analysed for TiO2 and Al2O3 aqueous Nanofluids using computational fluid dynamics. The use Nanofluid as a working fluid significantly enhances the boiling critical heat flux (CHF). It has been found that the CHF enhancement in boiling is dependent on the type of Nanofluid as well as its concentration. The present study observed that by increasing the nanoparticles concentration, the bubble frequency increases. Two sets of Nanofluids, viz. Al2O3 and TiO2 with Volume of Fraction (VOF) of 0.05, 0.1, and 0.15 have been considered for the study. The obtained simulation results show that by increasing the nanoparticles concentration, the TSHF and HTC increase proportionally. TiO2 nanoparticles with various VOF give better results after a time interval of 1.4 s compared to Al2O3 and water.