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Augmentation of Heat Transfer in a Circular Channel with Inline and Staggered Baffles

Author

Listed:
  • Muneerah Al Nuwairan

    (Department of Mathematics and Statistics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi Arabia)

  • Basma Souayeh

    (Department of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi Arabia
    Laboratory of Fluid Mechanics, Physics Department, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis 2092, Tunisia)

Abstract

This numerical investigation presents the effects of the position of baffles in the shape of a circle’s segment placed inside a circular channel to improve the thermal and flow performance of a solar air heater. Three different baffles’ positions with Reynolds number varying between 10,000 to 50,000 were investigated computationally. The k-omega SST model was used for solving the governing equations. Air was taken as the working fluid. Three pitch ratios (Y = 3, 4, and 5) were considered, while the height of the baffles remained fixed. The result showed an enhancement in Nusselt number, friction factor, j-factor, and thermal performance factor. Staggered exit-length baffles showed maximum enhancement in heat transfer and pressure drop, while inline inlet-length baffles showed the least enhancement. For a pitch ratio of Y = 3.0, the enhancement in all parameters was the highest, while for Y = 5.0, the enhancement in all parameters was the least. The highest thermal performance factor of 1.6 was found for SEL at Y = 3.0.

Suggested Citation

  • Muneerah Al Nuwairan & Basma Souayeh, 2021. "Augmentation of Heat Transfer in a Circular Channel with Inline and Staggered Baffles," Energies, MDPI, vol. 14(24), pages 1-20, December.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:24:p:8593-:d:706922
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    References listed on IDEAS

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    1. Jouybari, Nima Fallah & Lundström, T. Staffan, 2020. "Performance improvement of a solar air heater by covering the absorber plate with a thin porous material," Energy, Elsevier, vol. 190(C).
    2. Goel, Varun & Kumar, Rajneesh & Bhattacharyya, Suvanjan & Tyagi, V.V. & Abusorrah, Abdullah M., 2021. "A comprehensive parametric investigation of hemispherical cavities on thermal performance and flow-dynamics in the triangular-duct solar-assisted air-heater," Renewable Energy, Elsevier, vol. 173(C), pages 896-912.
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    Cited by:

    1. Basma Souayeh & Kashif Ali Abro & Suvanjan Bhattacharyya, 2023. "Editorial for the Special Issue “Heat Transfer Enhancement and Fluid Flow Features Due to the Addition of Nanoparticles in Engineering Applications”," Energies, MDPI, vol. 16(5), pages 1-3, February.
    2. Huda Alfannakh & Basma Souayeh & Najib Hdhiri & Muneerah Al Nuwairan & Muayad Al-Shaeli, 2022. "Entropy Generation and Natural Convection Heat Transfer of (MWCNT/SWCNT) Nanoparticles around Two Spaced Spheres over Inclined Plates: Numerical Study," Energies, MDPI, vol. 15(7), pages 1-31, April.

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