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Experimental and Numerical Investigations of Transient Natural Convection in Differentially Heated Air-Filled Tall Cavity

Received: 19 June 2015     Accepted: 30 June 2015     Published: 2 July 2015
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Abstract

The two-dimensional laminar natural convective transient flow characteristics in a differentially heated air-filled tall cavity with gradual heating are investigated both experimentally and numerically for various parameters such as Rayleigh number and temperature difference. Experimental computations are performed for temperature difference varying from (∆T = 5°C) to (∆T = 23°C) while the Rayleigh number varies from (Ra = 2929) to (Ra =11772) to cover a wide range of the flow field inside the cavity. The results show that as the Rayleigh number increases the flow becomes unstable. Also, the flow characteristics are observed to be multi-cellular and time variant especially at high Rayleigh numbers. Moreover, numerical computations are performed to compare with the experimental results.

Published in American Journal of Modern Energy (Volume 1, Issue 2)
DOI 10.11648/j.ajme.20150102.12
Page(s) 30-43
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2015. Published by Science Publishing Group

Keywords

Natural Convection, Tall Cavity, Experimental Investigation, Transient, Gradual Heating

References
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Cite This Article
  • APA Style

    Lioua Kolsi, Mohamed Bechir Ben Hamida, Walid Hassen, Ahmed Kadhim Hussein, Mohamed Naceur Borjini, et al. (2015). Experimental and Numerical Investigations of Transient Natural Convection in Differentially Heated Air-Filled Tall Cavity. American Journal of Modern Energy, 1(2), 30-43. https://doi.org/10.11648/j.ajme.20150102.12

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    ACS Style

    Lioua Kolsi; Mohamed Bechir Ben Hamida; Walid Hassen; Ahmed Kadhim Hussein; Mohamed Naceur Borjini, et al. Experimental and Numerical Investigations of Transient Natural Convection in Differentially Heated Air-Filled Tall Cavity. Am. J. Mod. Energy 2015, 1(2), 30-43. doi: 10.11648/j.ajme.20150102.12

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    AMA Style

    Lioua Kolsi, Mohamed Bechir Ben Hamida, Walid Hassen, Ahmed Kadhim Hussein, Mohamed Naceur Borjini, et al. Experimental and Numerical Investigations of Transient Natural Convection in Differentially Heated Air-Filled Tall Cavity. Am J Mod Energy. 2015;1(2):30-43. doi: 10.11648/j.ajme.20150102.12

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  • @article{10.11648/j.ajme.20150102.12,
      author = {Lioua Kolsi and Mohamed Bechir Ben Hamida and Walid Hassen and Ahmed Kadhim Hussein and Mohamed Naceur Borjini and S. Sivasankaran and Suvash C. Saha and Mohamed M. Awad and Farshid Fathinia and Habib Ben Aissia},
      title = {Experimental and Numerical Investigations of Transient Natural Convection in Differentially Heated Air-Filled Tall Cavity},
      journal = {American Journal of Modern Energy},
      volume = {1},
      number = {2},
      pages = {30-43},
      doi = {10.11648/j.ajme.20150102.12},
      url = {https://doi.org/10.11648/j.ajme.20150102.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajme.20150102.12},
      abstract = {The two-dimensional laminar natural convective transient flow characteristics in a differentially heated air-filled tall cavity with gradual heating are investigated both experimentally and numerically for various parameters such as Rayleigh number and temperature difference. Experimental computations are performed for temperature difference varying from (∆T = 5°C) to (∆T = 23°C) while the Rayleigh number varies from (Ra = 2929) to (Ra =11772) to cover a wide range of the flow field inside the cavity. The results show that as the Rayleigh number increases the flow becomes unstable. Also, the flow characteristics are observed to be multi-cellular and time variant especially at high Rayleigh numbers. Moreover, numerical computations are performed to compare with the experimental results.},
     year = {2015}
    }
    

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  • TY  - JOUR
    T1  - Experimental and Numerical Investigations of Transient Natural Convection in Differentially Heated Air-Filled Tall Cavity
    AU  - Lioua Kolsi
    AU  - Mohamed Bechir Ben Hamida
    AU  - Walid Hassen
    AU  - Ahmed Kadhim Hussein
    AU  - Mohamed Naceur Borjini
    AU  - S. Sivasankaran
    AU  - Suvash C. Saha
    AU  - Mohamed M. Awad
    AU  - Farshid Fathinia
    AU  - Habib Ben Aissia
    Y1  - 2015/07/02
    PY  - 2015
    N1  - https://doi.org/10.11648/j.ajme.20150102.12
    DO  - 10.11648/j.ajme.20150102.12
    T2  - American Journal of Modern Energy
    JF  - American Journal of Modern Energy
    JO  - American Journal of Modern Energy
    SP  - 30
    EP  - 43
    PB  - Science Publishing Group
    SN  - 2575-3797
    UR  - https://doi.org/10.11648/j.ajme.20150102.12
    AB  - The two-dimensional laminar natural convective transient flow characteristics in a differentially heated air-filled tall cavity with gradual heating are investigated both experimentally and numerically for various parameters such as Rayleigh number and temperature difference. Experimental computations are performed for temperature difference varying from (∆T = 5°C) to (∆T = 23°C) while the Rayleigh number varies from (Ra = 2929) to (Ra =11772) to cover a wide range of the flow field inside the cavity. The results show that as the Rayleigh number increases the flow becomes unstable. Also, the flow characteristics are observed to be multi-cellular and time variant especially at high Rayleigh numbers. Moreover, numerical computations are performed to compare with the experimental results.
    VL  - 1
    IS  - 2
    ER  - 

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Author Information
  • College of Engineering, Mechanical Engineering Department, Ha?l University, Ha?l City, Saudi Arabia

  • High School of Sciences and Technology of Hammam Sousse (ESSTHS), Department of Physics, University of Sousse, Sousse, Tunisia

  • Research Unit of Metrology and Energy Systems, National Engineering School, Energy Engineering Department, University of Monastir, Monastir city, Tunisia

  • College of Engineering, Mechanical Engineering Department, Babylon University, Babylon City, Hilla, Iraq

  • Research Unit of Metrology and Energy Systems, National Engineering School, Energy Engineering Department, University of Monastir, Monastir city, Tunisia

  • Institute of Mathematical Sciences, University of Malaya, Kuala Lumpur, Malaysia

  • School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane QLD, Australia

  • Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University, Mansoura city, Egypt

  • Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, UTM Johor Bahru, Malaysia

  • Research Unit of Metrology and Energy Systems, National Engineering School, Energy Engineering Department, University of Monastir, Monastir city, Tunisia

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