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MHD Natural Convection and Radiation over a Flame in a Partially Heated Semicircular Cavity Filled with a Nanofluid

Author

Listed:
  • Obai Younis

    (Department of Mechanical Engineering, College of Engineering at Wadi Addwaser, Prince Sattam Bin Abdulaziz University, Wadi Addwaser 11991, Saudi Arabia
    Department of Mechanical Engineering, Faculty of Engineering, University of Khartoum, Khartoum 11111, Sudan)

  • Milad Alizadeh

    (Department of Thermofluid, Faculty of Mechanical Engineering, Babol Nooshirvani University of Technology, Babol 47148-71167, Iran)

  • Ahmed Kadhim Hussein

    (Mechanical Engineering Department, College of Engineering, University of Babylon, Hilla 00964, Iraq)

  • Bagh Ali

    (Faculty of Computer Science and Information Technology, Superior University, Lahore 54000, Pakistan)

  • Uddhaba Biswal

    (Department of Mathematics, National Institute of Technology Rourkela, Rourkela 769008, India)

  • Emad Hasani Malekshah

    (Department of Power Engineering and Turbomachinery, Silesian University of Technology, 44-100 Gliwice, Poland)

Abstract

The numerical analysis of MHD-free convective heat transfer and its interaction with the radiation over a heated flame inside a porous semicircular cavity loaded with SWCNTs–water nanofluid was explored for the very first time in the present work. The two circular arcs of the upper wall of the enclosure were preserved at a constant cold temperature, whereas the middle region of it was considered adiabatic. The midland region of the lower wall was heated partially, while other regions were also assumed adiabatic. An internal hot flame was included inside the cavity, while the cavity was exposed to a magnetic field. The results were illustrated for Hartmann number (0 ≤ Ha ≤ 100), Rayleigh number (10 4 ≤ Ra ≤ 10 6 ), heated region length (0.1 ≤ L ≤ 0.3), solid volumetric fraction (0 ≤ φ ≤ 0.04), Darcy number (10 −3 ≤ Da ≤ 10 −5 ) and radiation parameter (0 ≤ Rd ≤ 1). It was found that decreasing L is the best option for enhancing natural convection. Moreover, it was noted that (Nu out ) is directly proportion to (Ra), ( ϕ ), (Rd) and (Da) increase. In contrast, it was in reverse proportion to (Ha). Furthermore, the results showed that augmentation of about (4%) and a decrement of (56.55%) are obtained on the average (Nu) on the heated length by increasing the radiation and the Hartmann number, respectively. Moreover, raising the radiation number from (0 to 1) causes an augmentation of about (73%) in the average (Nu) of the heated flame. Results also indicated that increasing the Hartmann number will cause a decrement of about (82.4%) of the maximum velocity profile in the vertical direction.

Suggested Citation

  • Obai Younis & Milad Alizadeh & Ahmed Kadhim Hussein & Bagh Ali & Uddhaba Biswal & Emad Hasani Malekshah, 2022. "MHD Natural Convection and Radiation over a Flame in a Partially Heated Semicircular Cavity Filled with a Nanofluid," Mathematics, MDPI, vol. 10(8), pages 1-31, April.
    • Handle: RePEc:gam:jmathe:v:10:y:2022:i:8:p:1347-:d:796470
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    References listed on IDEAS

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    1. Sheikholeslami, M. & Gorji-Bandpy, M. & Ganji, D.D., 2013. "Numerical investigation of MHD effects on Al2O3–water nanofluid flow and heat transfer in a semi-annulus enclosure using LBM," Energy, Elsevier, vol. 60(C), pages 501-510.
    2. Sajid, Muhammad Usman & Ali, Hafiz Muhammad, 2019. "Recent advances in application of nanofluids in heat transfer devices: A critical review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 103(C), pages 556-592.
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    Cited by:

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