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Lattice Boltzmann simulation of natural convection in a square enclosure with discrete heating

Author

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  • Dadvand, Abdolrahman
  • Saraei, Sina Hassanzadeh
  • Ghoreishi, Soheila
  • Chamkha, Ali J.

Abstract

In the present work, natural convection heat transfer in a differentially heated cavity is considered, in which, source–sink pairs are located on vertical walls with a constant temperature while other wall parts of the enclosure are insulated. The effects of different arrangements, sizes, and number of heat source–sink pairs on the flow and thermal fields are investigated by using the Lattice Boltzmann Method to solve the flow and thermal field equations. In this paper, streamlines, isotherms, the average Nusselt number, and the entropy generation are presented to get a better insight into the nature of the problem. Results of this study showed that the arrangement of the heat source–sink pairs could strongly affect the flow and thermal fields in the cavity due to the formation of the vortices. It was also found that the highest amount of heat transfer with the lowest entropy generation was achieved by splitting the discrete heat source–sink pairs into the smaller segments and putting them alternately on one sidewall.

Suggested Citation

  • Dadvand, Abdolrahman & Saraei, Sina Hassanzadeh & Ghoreishi, Soheila & Chamkha, Ali J., 2021. "Lattice Boltzmann simulation of natural convection in a square enclosure with discrete heating," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 179(C), pages 265-278.
    • Handle: RePEc:eee:matcom:v:179:y:2021:i:c:p:265-278
    DOI: 10.1016/j.matcom.2020.07.025
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    References listed on IDEAS

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    1. Jami, Mohammed & Mezrhab, Ahmed & Bouzidi, M’hamed & Lallemand, Pierre, 2006. "Lattice-Boltzmann computation of natural convection in a partitioned enclosure with inclined partitions attached to its hot wall," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 368(2), pages 481-494.
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    Cited by:

    1. Kumar, Anil & Rao, Pentyala Srinivasa, 2023. "Numerical study of periodically heated wall effect on natural convection in an enclosure," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 211(C), pages 118-133.

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