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Three dimensional lattice Boltzmann simulation for mixed convection of nanofluids in the presence of magnetic field

Zhou, Wenning; Yan, Yuying; Xie, Yulei; Liu, Baiqian


Wenning Zhou

Professor of Thermofluids Engineering

Yulei Xie

Baiqian Liu


In the present study, a three dimensional thermal lattice Boltzmann model was developed to investigate the flow dynamics and mixed convection heat transfer of Al2O3/water nanofluid in a cubic cavity in the presence of magnetic field. The model was first validated with previous numerical and experimental results. Satisfactory agreement was obtained. Then the effects of Rayleigh number, nanoparticle volume fraction, Hartmann number and Richardson number on nanofluid flow dynamics and heat transfer were examined. Numerical results indicate that adding nanoparticles to pure water leads to heat transfer enhancement for low Rayleigh numbers. However, this enhancement might be weakened and even reversed for high Rayleigh numbers. In addition, the results show the external applied magnetic field has an effect of suppressing the convective heat transfer in the cavity. Moreover, the results demonstrate that the Richardson number in mixed convection has significant influences on both streamlines and temperature field.

Journal Article Type Article
Acceptance Date Sep 17, 2016
Online Publication Date Dec 2, 2016
Publication Date Jan 1, 2017
Deposit Date Mar 3, 2017
Publicly Available Date Dec 3, 2018
Journal International Communications in Heat and Mass Transfer
Print ISSN 0735-1933
Electronic ISSN 0735-1933
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 80
Keywords Nanofluid; Magnetic field; Mixed convection; 3D numerical modeling; Lattice Boltzmann method
Public URL
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