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

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

Abstract

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.

Citation

Zhou, W., Yan, Y., Xie, Y., & Liu, B. (2017). Three dimensional lattice Boltzmann simulation for mixed convection of nanofluids in the presence of magnetic field. International Communications in Heat and Mass Transfer, 80, https://doi.org/10.1016/j.icheatmasstransfer.2016.11.012

• 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
• DOI: https://doi.org/10.1016/j.icheatmasstransfer.2016.11.012
• Keywords: Nanofluid; Magnetic field; Mixed convection; 3D numerical modeling; Lattice Boltzmann method
• Public URL: https://nottingham-repository.worktribe.com/output/831084
• Publisher URL: http://www.sciencedirect.com/science/article/pii/S0735193316303360