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Heat Transfer Research
インパクトファクター: 0.404 5年インパクトファクター: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN 印刷: 1064-2285
ISSN オンライン: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2013004029
pages 145-169

FREE CONVECTION IN RECTANGULAR ENCLOSURES CONTAINING NANOFLUID WITH NANOPARTICLES OF VARIOUS DIAMETERS

Saeid Jani
Department of Mechanical Engineering, Golpayegan University of Technology, Golpayegan, Iran
Mostafa Mahmoodi
Department of Mechanical Engineering, Amirkabir University of Technology, Tehran 15875-4413, Iran; Department of Mechanical Engineering, University of Kashan, Kashan 87317-53153, Iran
Meysam Amini
Energy Technologies Research Division, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
Mohammad Akbari
Department of Mechanical Engineering, Semnan University, Semnan, Iran

要約

Free convection heat transfer in rectangular enclosures filled with Al2O3−water nanofluid is investigated numerically, and the effects of suspended nanoparticles of different diameters are considered. The governing equations in terms of primitive variables are discretized numerically using the finite volume method and SIMPLER algorithm. The results were obtained for width range of the Rayleigh number, nanoparticles volume fraction and aspect ratio of cavity. Also nanoparticles with two different diameters, namely 36 nm and 47 nm have been chosen. The obtained results showed that for the square enclosure utilizing the suspended nanoparticles with both considered diameters the rate of heat transfer increased only at Ra = 103 that conduction dominated the heat transfer process, while at other Rayleigh numbers, a deterioration on average Nusselt number was observed.


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