Nanofluids flow between two rotating cylinders: Effects of thermophoresis and brownian motion
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Author list: Matin M.H., Mahian O., Wongwises S.
Publisher: American Institute of Aeronautics and Astronautics
Publication year: 2013
Journal: Journal of Thermophysics and Heat Transfer (0887-8722)
Volume number: 27
Issue number: 4
Start page: 748
End page: 755
Number of pages: 8
ISSN: 0887-8722
eISSN: 1533-6808
Languages: English-Great Britain (EN-GB)
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Abstract
In this paper, the effects of thermophoresis and Brownian motion on the heat transfer of nanofluids between two rotating cylinders are investigated. The flow between the cylinders is considered laminar and steady, whereas the walls of the cylinders are kept at different constant temperatures. The governing equations, including momentum, energy, and volume fraction in cylindrical coordinates, are simplified and solved. An exact solution for the velocity distribution is presented and the homotopy perturbation method is employed to obtain the temperature field. The results obtained from the homotopy perturbation method are validated with the results of a numerical solution. The effects of various quantities of the Eckert and Prandtl numbers, the rotational velocity ratio of the cylinders, Brownian motion, and thermophoresis parameters on the temperature field, and Nusselt number in the annulus are examined ฉ 2013 by the American Institute of Aeronautics and Astronautics, Inc.
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