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Heat Transfer Research
Fator do impacto: 0.404 FI de cinco anos: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Imprimir: 1064-2285
ISSN On-line: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2018018737
Forthcoming Article

Natural convection simulation of Al2O3/water nanofluid in a complex wavy-wall cavity using lattice Boltzmann method

Alireza Shahriari
university of Zabol
Ebrahim Jahanshahi Javaran
Department of Energy, Institute of Science, High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran
Mohammad Rahnama
Department of Mechanical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran

RESUMO

In this paper, two dimensional natural convection of Al2O3/water nanofluid is presented using Lattice Boltzmann method. Natural convection occurs in a cavity with two complex-wavy vertical walls, as hot and cold surfaces while top and bottom walls are insulated. Effect of pertinent parameters such as volume fraction of nanoparticles, Rayleigh numbers and complex-wavy-wall geometry parameters on flow and heat transfer fields are investigated in detail. Results show an increase in Nusselt number with volume fraction for Rayleigh numbers in the range of 103 < Re < 106. Moreover, the effect of wavy-surface geometry parameters such as wavelength and amplitude ratio, on heat transfer is studied and an optimum value for heat transfer rate is obtained.