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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
EFFECT OF THE SHAPE OF NANOPARTICLES AND BASE FLUIDS ON THE THERMOPHYSICAL PROPERTIES OF NANOFLUIDS
Submission Author:
Felipe Silva dos Santos , MG , Brazil
Co-Authors:
Abdul Orlando Cárdenas Gómez, Felipe Silva dos Santos, ENIO PEDONE BANDARRA FILHO
Presenter: Felipe Silva dos Santos
doi://10.26678/ABCM.ENCIT2020.CIT20-0298
Abstract
The current work aims the experimental investigation of the thermophysical properties of nanofluid with different sizes of nanoparticles and different base fluid. The nanofluids were produced based on a mixture of water and ethylene glycol (50:50% wt.) and also OT-100 thermal oil. The nanoparticles used were silver and carbon nanotubes dispersed into the base fluid using the two-step method. The nanofluids thermophysical properties, thermal conductivity, viscosity, and density were measured experimentally. Increases in thermal conductivity and dynamic viscosity of all samples were observed with the addition of nanoparticles. These behaviors were attributed to the influence of the base fluid and the effects of movement and iteration between nanoparticles and nanoparticles with the base fluid of the samples. Models were proposed to evaluate the thermal conductivity and viscosity showing good agreement with the experimental results and also the results found in the literature.
Keywords
Nanofluids, nanoparticles, mathematical models, thermal conductivity, viscosity
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