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In this work, experimental study of graphene nanoparticles in the base fluid as ethylene glycol/distilled water for multichannel flow has been carried out. The graphene with varied concetration were suspended in the base fluid. The heating elements were used to vary the required fluid inlet temperature of the channel using controller.The experiment was conducted with different flow rates from 1.74 LPM to 3.02 LPM for various positions of the valve. The Nusselt number increased by 5.46% at 400C and 9.71% at 500C respectively. The enhanced heat transfer is due to more surface area and better conductivity of graphene nanoparticle. The outcome of the work will be useful to choose appropriate coolant to radiators of automotive applications. [ABSTRACT FROM AUTHOR]

Performance of Graphite and Al2O3 nanofluids mixed in the base fluid - Ethylene Glycol: Water (60:40) as radiator working fluid in a three-dimensional flat-tube taken from Chrysler minivan is compared through computational analysis. Properties are calculated from mathematical correlations developed from experiments on nanofluids and used for numerical analysis. The model is validated for average heat transfer coefficient and Nusselt number under Laminar regime for Reynolds number 1000, 1500, and 2000 using Al2O3 for 1% and 10% concentrations with the result in the available literature. Then, the average heat transfer coefficient and average Nusselt number of Al2O3 and Graphite are compared for 1% and 10% volumetric concentrations, and the results are presented. The average heat transfer coefficient of Graphite is higher than Al2O3 with a percentage increase of 3.29% for 1% concentration and 5.17% for 10% concentration. [ABSTRACT FROM AUTHOR]

In this study, the effect of graphene nanoparticles suspension in the base fluid as distilled water/ethylene glycol for an automobile radiator has been studied by using Computational modeling techniques. The graphene concentration of 0.1%, 0.2% and 0.3% were suspended in the base fluid. Electrical heaters varied the fluid inlet temperature of the radiator with the PID controller at 40°C and 50°C. The experiment is performed by varying the inlet temperature as 45°C, 55°C for some fixed flow rate as 2.59LPM, 2.47LPM.It was observed that by increasing the volume concentration of graphene nanoparticle in the base fluid, the nusselt number increased by 7.25 % at 45°C and 9.99% at 55°C inlet temperatures respectively. The increase of nusselt number was due to the increase in contact surface for heat dissipation and higher thermal conductivity of graphene nanoparticles CFD analysis of the radiator tube was performed by ANSYS fluent, and the results were validated with the experimental results. [ABSTRACT FROM AUTHOR]