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Thermal Non-Equilibrium Heat Transfer Modeling of Hybrid Nanofluids in a Structure Composed of the Layers of Solid and Porous Media and Free Nanofluids

Author

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  • Ali J. Chamkha

    (Mechanical Engineering Department, Prince Mohammad Bin Fahd University, Al-Khobar 31952, Saudi Arabia
    RAK Research and Innovation Center, American University of Ras Al Khaimah, P.O. Box 10021, Ras Al Khaimah, UAE)

  • Sina Sazegar

    (Department of Mechanical Engineering, Dezful Branch, Islamic Azad University, Dezful, Iran)

  • Esmael Jamesahar

    (Department of Mechanical Engineering, Dezful Branch, Islamic Azad University, Dezful, Iran)

  • Mohammad Ghalambaz

    (Department of Mechanical Engineering, Dezful Branch, Islamic Azad University, Dezful, Iran)

Abstract

The free convection heat transfer of hybrid nanofluids in a cavity space composed of a clear flow, porous medium and a solid part is addressed. The cavity is heated from the bottom and cooled from the top. The side walls are well insulated. The upper part of the cavity is a clear space with no porous or solid materials and is filled with hybrid nanofluid. The bottom part is divided into two parts of a porous space saturated with the hybrid nanofluid and a solid thermal conductive block. There are conjugate heat transfer mechanisms between the solid block and the porous medium filled with the hybrid nanofluid as well as the hybrid nanofluid in the clear space. For the porous medium model, the local thermal non-equilibrium effects are considered. The hybrid nanofluids contain copper (20 nm) and alumina nanoparticles (40 nm) hybrid nanoparticles. The governing equations for the flow and heat transfer of the hybrid nanofluid in the clear space and the porous medium are introduced. Considering the conjugate heat transfer between the solid block and the hybrid nanofluid fluid in the pores and the porous matrix, appropriate boundary conditions for heat channeling are utilized. The governing equations are transformed into non-dimensional form to generalize the model. The finite element method is employed to solve the equations. The grid check and validation procedure are performed. Subsequently streamlines, isotherms, and Nusselt number are studied as important aspects of flow and heat transfer in the cavity. The increase in the portion of the clear flow part in the cavity enhances heat transfer due to better hybrid nanofluid circulation.

Suggested Citation

  • Ali J. Chamkha & Sina Sazegar & Esmael Jamesahar & Mohammad Ghalambaz, 2019. "Thermal Non-Equilibrium Heat Transfer Modeling of Hybrid Nanofluids in a Structure Composed of the Layers of Solid and Porous Media and Free Nanofluids," Energies, MDPI, vol. 12(3), pages 1-27, February.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:3:p:541-:d:204530
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    References listed on IDEAS

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    1. Sarkar, Jahar & Ghosh, Pradyumna & Adil, Arjumand, 2015. "A review on hybrid nanofluids: Recent research, development and applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 164-177.
    2. Ranga Babu, J.A. & Kumar, K. Kiran & Srinivasa Rao, S., 2017. "State-of-art review on hybrid nanofluids," Renewable and Sustainable Energy Reviews, Elsevier, vol. 77(C), pages 551-565.
    3. Devendiran, Dhinesh Kumar & Amirtham, Valan Arasu, 2016. "A review on preparation, characterization, properties and applications of nanofluids," Renewable and Sustainable Energy Reviews, Elsevier, vol. 60(C), pages 21-40.
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    Cited by:

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    2. Nguyen, Truong Khang & Usman, Muhammad & Sheikholeslami, M. & Haq, Rizwan Ul & Shafee, Ahmad & Jilani, Abdul Khader & Tlili, I., 2020. "Numerical analysis of MHD flow and nanoparticle migration within a permeable space containing Non-equilibrium model," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 537(C).
    3. Tayebi, Tahar & Chamkha, Ali J. & Öztop, Hakan F. & Bouzeroura, Lynda, 2022. "Local thermal non-equilibrium (LTNE) effects on thermal-free convection in a nanofluid-saturated horizontal elliptical non-Darcian porous annulus," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 194(C), pages 124-140.

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