Entropy generation of nanofluid in presence of magnetic field using Lattice Boltzmann Method

In this paper magnetohydrodynamic free convection flow of CuO–water nanofluid in a square enclosure with a rectangular heated body is investigated numerically using Lattice Boltzmann Method (LBM) scheme. The effective thermal conductivity and viscosity of nanofluid are calculated by KKL (Koo–Kleinst...

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Bibliographic Details
Published in:Physica A 2015-01, Vol.417, p.273-286
Main Authors: Sheikholeslami, Mohsen, Ganji, Davood Domiri
Format: Article
Language:English
Subjects:
Entropy generation
Heat transfer
Lattice Boltzmann Method
Magnetohydrodynamic
Nanofluid
Natural convection
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Summary:In this paper magnetohydrodynamic free convection flow of CuO–water nanofluid in a square enclosure with a rectangular heated body is investigated numerically using Lattice Boltzmann Method (LBM) scheme. The effective thermal conductivity and viscosity of nanofluid are calculated by KKL (Koo–Kleinstreuer–Li) correlation. The influence of pertinent parameters such as Hartmann number, nanoparticle volume fraction and Rayleigh number on the flow, heat transfer and entropy generation have been examined. The results show that the heat transfer rate and Dimensionless entropy generation number increase with increase of the Rayleigh number and nanoparticle volume fraction but it decreases with increase of the Hartmann number. •LBM is applied to solve the governing equations.•Entropy generation of nanofluid in presence of magnetic field is studied.•Nu increases with increase of φ and Ra.•Ns decreases with increase of Ha.
ISSN:0378-4371
1873-2119
DOI:10.1016/j.physa.2014.09.053