Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Numerical analysis of the thermohydraulic performance of silver/water nanofluids in turbulent flow
Submission Author:
Erick Oliveira do Nascimento , PA
Co-Authors:
Erick Oliveira do Nascimento, ENIO PEDONE BANDARRA FILHO, Luben Cabezas Gómez
Presenter: Erick Oliveira do Nascimento
doi://10.26678/ABCM.COBEM2023.COB2023-1396
Abstract
Horizontal tubes are one of the most used heat exchangers in the industry and are usually used in turbulent flows due to the higher heat transfer provided or by the operating characteristic where they are applied. Several researchers have dispersed nanoparticles in conventional coolants in order to increase the thermal conductivity, although this dispersion can also lead to an increase in pumping power, due to the increase in fluid viscosity. Thus, the objective of this work is to numerically evaluate the thermohydraulic performance of silver-water nanofluids in volumetric concentrations of 0.1 – 0.5% in a horizontal circular tube in turbulent flow with inlet temperature of 20 ºC and the specific heat flux of 20 kW/m2. The obtained results are compared with experimental and theoretical data available in the literature. From the results obtained, it was identified that the nanofluid with the highest concentration of nanoparticles had an increase of up to 14.23% in the convective coefficient of heat transfer when compared to the base fluid, while the pumping power showed a reduction of up to 3.07% for the same analyzed condition, due to the reduction of up to 5.83% in the Reynolds number due to the increase in dynamic viscosity caused by the addition of nanoparticles. Therefore, all silver-water nanofluids numerically analyzed in this work present better thermohydraulic performance in comparison to the base fluid, making them considered for heat transfer applications in turbulent flow.
Keywords
Nanofluid, silver, Heat transfer, Thermohydraulic Performance, Computational Fluid Dynamics
