Abstract
Hybrid nanofluids contain two or more types of nanoparticles mixed with conventional coolant to enhance the thermophysical properties at atomic level. In this study, CuO/SiO2 nanoparticles are distributed evenly in an ethylene glycol-based coolant and a hybrid nanofluid is formed to investigate the effect of heat transfer and thermophysical properties on automobile engines. The simulation is carried out for various volume concentrations ranging from 0.1% to 0.5%. A significant enhancement is noted in the result as the nanoparticle used exhibits higher thermal conductivity. An enhancement in thermal conductivity is noted to be 6.5% higher than the water/EG coolant. A significant enhancement of 48.24% is noted within Nusselt number and the heat transfer rate. As the volume concentration of nanoparticle is increase from 0.1% to 0.5%, due turbulent nature of flow higher amalgamation of nanoparticle results in better thermal performance of automobile system. A reduction of specific heat is noted at volume concentration of 0.5% is much better as compared to volume concentration of 0.1% nanofluid and water/EG coolant. The superior properties of hybrid nanofluid make it an attractive choice as an automobile coolant as the overall efficiency of automobile increases. The result obtained shows tremendous possibility to improve the performance of automobile and reduce fuel consumption.
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