Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Numerical analysis of the thermal performance of an automotive radiator using graphene nanofluids
Submission Author:
Erick Oliveira do Nascimento , PA
Co-Authors:
Erick Oliveira do Nascimento, Edwin Martin Cardenas Contreras, ENIO PEDONE BANDARRA FILHO
Presenter: Erick Oliveira do Nascimento
doi://10.26678/ABCM.COBEM2021.COB2021-0279
Abstract
The conventional coolant fluids used in automotive radiators present low heat transfer rate for the new needs of the automobile industry. Therefore, this work aims to analyze the convective heat transfer of graphene nanofluids/water-Ethylene glycol (50:50 by volume) flowing in an elliptical automotive radiator, in laminar, through the computational fluid dynamics. This flow was simulated numerically for three different nanoparticles concentration (0.01, 0.05 and 0.1 vol.%), in addition to the base fluid, under the condition that the solid particles are sufficiently dispersed to consider the fluid as single-phase and incompressible, for the mass flow of 0.09 kg/s and inlet temperature of the nanofluids from 55 ºC to 85 ºC, while the air velocity and temperature were maintained constant 25 ºC. The results were compared with those available in the literature and it was observed that the studied nanofluids, can increase the heat transfer rate related to the base fluid. In addition, the volumetric concentration of the nanoparticles and the nanofluid temperature have directly influence in the results. It was also observed a tendency to increase considerably the Nusselt number with the inlet temperature of the nanofluid. Finally, it is important to highlight that the graphene/water-EG nanofluids evaluated numerically in this work showed promising thermal performances for automotive applications.
Keywords
Heat transfer, Nanofluids, Automotive radiator, Computational Fluid Dynamics
