THERMAL SCIENCE

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Boshu He

,

Zhaoping Ying

NUMERICAL INVESTIGATION OF MOLTEN SALT-BASED NANOFLUID LAMINAR HEAT TRANSFER IN A CIRCULAR TUBE USING EULERIAN-LAGRANGIAN METHOD

ABSTRACT
Molten salt-based nanofluid in a laminar region of a circular tube with constant wall heat flux was numerically investigated. An Eulerian-Lagrangian method, discrete phase model, was used to predict the heat transfer performance of nanofluid, considering the factors of inlet Reynolds number, the mass concentration of the nanoparticles, and nanoparticles diameter. Validation results were found in a good match with experimental results obtained from the literature. Numerical results showed that the heat transfer performance of nanofluid was considerably better than that of pure molten salt. The local heat transfer coefficient and Nusselt number of nanofluid are about 30% higher than these of pure molten salt and increase with an increase of Reynolds number and nanoparticles concentration. Moreover, the heat transfer performance of nanofluid with the small size of the nanoparticles (10~100 nm) is improved significantly.
KEYWORDS
Molten salt-based nanofluid, laminar, Eulerian-Lagrangian method, heat transfer, numerical simulation
PAPER SUBMITTED: 2019-11-01
PAPER REVISED: 2020-06-25
PAPER ACCEPTED: 2020-06-29
PUBLISHED ONLINE: 2020-07-11
DOI REFERENCE: https://doi.org/10.2298/TSCI191101199H
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 5, PAGES [3427 - 3439]
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Numerical investigation of molten salt-based nanofluid laminar heat transfer in a circular tube using Eulerian-Lagrangian method

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence