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Heat exchange enhancement of ferrofluid flow into rectangular channel in the presence of a magnetic field

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  • Mehrez, Zouhaier
  • Cafsi, Afif El

Abstract

Heat exchange and Fe3O4/water nanofluid flow behaviors into horizontal channel subjected to the effect of a magnetic field was studied numerically. The basic equations were solved using the finite volume method with the time-splitting algorithm. The results were represented by temperature field, streamlines, velocity field, averaged and normalized Nusselt numbers, for various nanoparticles volume fractions, Reynolds numbers and magnetic numbers. Results show that the isotherms, the streamlines and the heat exchange rate are strongly changed by applying a magnetic field. A recirculation region is created near the magnetic source where the thermal boundary layer is removed enhancing so the local heat exchange. The overall heat exchange is enhanced by suspending nanoparticles and/or by increasing magnetic field strength. In the absence of a magnetic field, suspending nanoparticles can enhance heat exchange rate up to 20%. Under the only action of magnetic field a maximum 60% heat exchange enhancement is obtained. It can reach up to 86% as the combined effects of both nanoparticles and magnetic field are considered.

Suggested Citation

  • Mehrez, Zouhaier & Cafsi, Afif El, 2021. "Heat exchange enhancement of ferrofluid flow into rectangular channel in the presence of a magnetic field," Applied Mathematics and Computation, Elsevier, vol. 391(C).
    • Handle: RePEc:eee:apmaco:v:391:y:2021:i:c:s0096300320305889
    DOI: 10.1016/j.amc.2020.125634
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    References listed on IDEAS

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    1. Fatih Selimefendigil & Hakan F. Oztop & Mikhail A. Sheremet & Nidal Abu-Hamdeh, 2019. "Forced Convection of Fe 3 O 4 -Water Nanofluid in a Bifurcating Channel under the Effect of Variable Magnetic Field," Energies, MDPI, vol. 12(4), pages 1-16, February.
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    Cited by:

    1. Li, Xiang & Yu, Peng & Niu, Xiao-Dong & Li, De-Cai & Yamaguchi, Hiroshi, 2021. "A magnetic field coupling lattice Boltzmann model and its application on the merging process of multiple-ferrofluid-droplet system," Applied Mathematics and Computation, Elsevier, vol. 393(C).
    2. Syafiq Zainodin & Anuar Jamaludin & Roslinda Nazar & Ioan Pop, 2022. "MHD Mixed Convection of Hybrid Ferrofluid Flow over an Exponentially Stretching/Shrinking Surface with Heat Source/Sink and Velocity Slip," Mathematics, MDPI, vol. 10(23), pages 1-20, November.
    3. Iskandar Waini & Najiyah Safwa Khashi’ie & Abdul Rahman Mohd Kasim & Nurul Amira Zainal & Khairum Bin Hamzah & Norihan Md Arifin & Ioan Pop, 2022. "Unsteady Magnetohydrodynamics (MHD) Flow of Hybrid Ferrofluid Due to a Rotating Disk," Mathematics, MDPI, vol. 10(10), pages 1-20, May.
    4. Nur Syazana Anuar & Norfifah Bachok & Ioan Pop, 2021. "Influence of MHD Hybrid Ferrofluid Flow on Exponentially Stretching/Shrinking Surface with Heat Source/Sink under Stagnation Point Region," Mathematics, MDPI, vol. 9(22), pages 1-14, November.

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