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Heat Transfer Research
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ISSN Imprimir: 1064-2285

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

Volumen 50, Edición 11, 2019, pp. 1043-1059
DOI: 10.1615/HeatTransRes.2018028289
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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
Independent researcher

SINOPSIS

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.

PALABRAS CLAVE: free convection, entropy generation, heatline visualization, finite volume method, CuO-water nanofluid
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CITADO POR

  1. Hejri Saeid, Malekshah Emad Hasani, Cooling of an electronic processor based on numerical analysis on natural convection and entropy production over a dissipating fin equipped with copper oxide/water nanofluid with Koo-Kleinstreuer-Li model, Thermal Science and Engineering Progress, 23, 2021. Crossref

  2. Aqeel Ashraf Muhammad, Liu Zhenling, Hasani Malekshah Emad, Kolsi Lioua, Kadhim Hussein Ahmed, Coupling of BGK lattice Boltzmann method and experimental rheological/thermal behavior of Al2O3–oil nanolubricant for modeling of a finned thermal storage, International Journal of Numerical Methods for Heat & Fluid Flow, 32, 8, 2022. Crossref

  3. Rooman Muhammad, Jan Muhammad Asif, Shah Zahir, Alhawael Ghadah, Iqbal Shahid, Entropy optimization in hybrid radiative nanofluid flow with effect of variable magnetic field over exponential stretching plate, Waves in Random and Complex Media, 2022. Crossref

  4. Roja A., Gireesha B. J., Flow and heat transfer analysis of MHD third‐grade fluid flow through a vertical microchannel subjected to entropy generation, Heat Transfer, 2022. Crossref

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