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Heat Transfer Research
Импакт фактор: 0.404 5-летний Импакт фактор: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Печать: 1064-2285
ISSN Онлайн: 2162-6561

Выпуски:
Том 51, 2020 Том 50, 2019 Том 49, 2018 Том 48, 2017 Том 47, 2016 Том 46, 2015 Том 45, 2014 Том 44, 2013 Том 43, 2012 Том 42, 2011 Том 41, 2010 Том 40, 2009 Том 39, 2008 Том 38, 2007 Том 37, 2006 Том 36, 2005 Том 35, 2004 Том 34, 2003 Том 33, 2002 Том 32, 2001 Том 31, 2000 Том 30, 1999 Том 29, 1998 Том 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.2018028289
pages 1043-1059

FREE CONVECTION AND ENTROPY GENERATION IN A CuO/WATER NANOFLUID-FILLED TRIANGULAR CHANNEL WITH SINUSOIDAL WALLS

Alireza Rahimi
Faculty of Energy, University of Kashan, Kashan, Iran
Navid Vafa
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
Morteza Bayati
Department of Mechanical Engineering, Urmia University of Technology, Urmia, Iran
Abbas Kasaeipoor
Faculty of Engineering, Department of Mechanical Engineering, University of Isfahan, Hezar Jerib Avenue, Isfahan 81746-73441, Iran
Hamidreza Khakrah
Department of Mechanical Engineering, Shiraz Branch, Islamic Azad University, Shiraz, Iran
Emad Hasani Malekshah
School of Mathematical Sciences, The University of Adelaide, Adelaide, SA 5005, Australia

Краткое описание

The fluid flow, heat transfer, and entropy generation due to natural convection phenomenon in a fluid channel are investigated. The configuration of the channel is triangular. Moreover, the bottom and right walls are sinusoidal. The channel contains some circular bodies of constant high and low temperatures which serve as simplified fluid injection pipes. The channel is filled with CuO-water nanofluid; the Brownian motion and its influences on the dynamic viscosity are considered using the Koo-Kleinstreuer-Li (KKL) model. The effect of the shape of nanoparticles on the thermal conductivity is studied using shape factor. The finite volume method is employed to simulate natural convection. The Rayleigh number (103 < Ra < 106), solid volume fraction of nanofluid (φ = 0, 0.01, 0.02, 0.03, and 0.04), and thermal arrangements of internal pipes (Case A, Case B, Case C, and Case D) are considered as governing parameters. Impact of these governing parameters on the streamlines, heat transfer rate, local and total entropy generation and heatlines are studied, comprehensively. Overall, the results show that the heat transfer rate has direct relationship with the Rayleigh number and nanoparticle concentration. On the other hand, the entropy generation has direct and reverse relationship with the Rayleigh number and nanoparticle concentration.

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