THERMAL SCIENCE

International Scientific Journal

Weihua Cai

,

Zhifeng Zheng

,

Changye Huang

,

Yue Wang

,

Xin Zheng

,

Hongna Zhang

LATTICE BOLTZMANN SIMULATION OF RAYLEIGH-BENARD CONVECTION IN ENCLOSURES FILLED WITH AL2O3-WATER NANOFLUID

ABSTRACT
In order to clarify the controversies for the role of nanoparticles on heat transfer in natural convection, lattice Boltzmann method is used to investigate Rayleigh-Benard convection heat transfer in differentially-heated enclosures filled with Al2O3-water nanofluids. The results for streamline and isotherm contours, vertical velocity, and temperature profiles as well as the local and average Nusselt number are discussed for a wide range of Rayleigh numbers and nanoparticle volume fractions (0 ≤ Ф ≤ 5%). The results show that with the increase of Rayleigh number and nanoparticles loading, Nuave increases. It is suggested that the addition of nanoparticles can enhance the heat transfer in Rayleigh-Benard convection.
KEYWORDS
Lattice Boltzmann simulation, Rayleigh-Bénard convection, nanofluids, heat transfer, numerical simulation
PAPER SUBMITTED: 2017-10-23
PAPER REVISED: 2017-11-23
PAPER ACCEPTED: 2017-11-23
PUBLISHED ONLINE: 2018-02-18
DOI REFERENCE: https://doi.org/10.2298/TSCI171023038C
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2018, VOLUME 22, ISSUE Supplement 2, PAGES [S535 - S545]
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Lattice Boltzmann simulation of Rayleigh-Benard convection in enclosures filled with Al2O3-water nanofluid

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