Enhancing Flow and Heat Transfer Characteristics in Microchannels with Various Nanofluids

The substantial growth of power converters in electric vehicles necessitates more energy consumption and, as a result, greater heat generation. To avoid the power converter’s excessive heat, an innovative curved microchannel with diamond-shaped and pentagonal cross-sections was developed. The flow and heat transfer characteristics of the Gc₃N₄/Water (0.3%), Al₂O₃/Water (0.3%), and Al₂O₃-Gc₃N₄/Water (0.3%) hybrid nanofluid were assessed. The experimental investigation was carried out by different mass flow rates of about 0.1 to 0.5 LPM under a uniform heat flux of 50 kW/m². The heat sink had a cross-sectional area of 80×48mm². In comparison to the diamond channel heat sink through hybrid nanofluids, findings from experiments resulted that the heat transfer rate and pressure drop for the diamond channel enhanced by 14.2% and 18.9%, respectively. In comparison to Gc₃N₄/Water and Al₂O₃/Water nanofluids, the hybrid nanofluid improved the heat transfer rate for the diamond micro channel heat sink (MCHS) by 4.9% and 5.8%, respectively. Finally the hybrid MCHS with hybrid no fluid revealed better performance.