Numerical investigation on using inclined partitions to reduce natural convection inside the cavities of hollow bricks

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  • Additional Information
    • Author-Supplied Keywords:
      Finite volume method
      Hollow bricks
      Natural convection in enclosures
      Numerical simulation
      Partitioned cavities
      Thermal resistance
      Triangular enclosures
    • Abstract:
      Abstract: Hollow bricks are widely used to build facades because of their light weight and high thermal resistance. The air-filled voids within the brick configuration elevates the block’s resistance to heat penetration. Suppressing the natural convection inside the voids increases the blocks thermal resistance. This paper presents a new approach to suppress the convection currents inside brick’s cavities by inserting cell dividers. A numerical study on the effect of inserting a folded sheet inside the cavities of the hollow buildings brick is presented. The folded sheet divides the cavity into several triangles producing a string of small convection cells. The mass, momentum and energy equations are solved for a section of a masonry brick represented by a partitioned squared cavity. The inclined partitions are conductive and are in perfect contact with the walls of the cavity. The two outer vertical sides of the brick section are assumed to be isothermal and the two horizontal sides are insulated. Air, the fluid filling the voids, is modeled as a Newtonian fluid with density defined based on Boussinesq approximation. The heat flux transported across the partitioned voids depends on the number of partitions used and their thermal conductivity. The heat flux through the cavity decreases as the number of partitions increases. Moreover, the convection is nearly diminished when the number partitions becomes six. One day simulation for a typical summer conditions shows that inclined partitions can reduce the heat flux by 37–42% depending on the number of partitions and their material. [ABSTRACT FROM AUTHOR]
    • Abstract:
      Copyright of International Journal of Thermal Sciences is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
    • Author Affiliations:
      1Department of Thermal Engineering and Desalination Technology, King Abdulaziz University, P. O. Box 80204, Jeddah 21589, Saudi Arabia
    • ISSN:
      1290-0729
    • Accession Number:
      10.1016/j.ijthermalsci.2010.06.009
    • Accession Number:
      53573332
  • Citations
    • ABNT:
      ALHAZMY, M. M. Numerical investigation on using inclined partitions to reduce natural convection inside the cavities of hollow bricks. International Journal of Thermal Sciences, [s. l.], v. 49, n. 11, p. 2201–2210, 2010. DOI 10.1016/j.ijthermalsci.2010.06.009. Disponível em: http://widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=a9h&AN=53573332&authtype=sso&custid=s5834912. Acesso em: 24 jan. 2020.
    • AMA:
      Alhazmy MM. Numerical investigation on using inclined partitions to reduce natural convection inside the cavities of hollow bricks. International Journal of Thermal Sciences. 2010;49(11):2201-2210. doi:10.1016/j.ijthermalsci.2010.06.009.
    • APA:
      Alhazmy, M. M. (2010). Numerical investigation on using inclined partitions to reduce natural convection inside the cavities of hollow bricks. International Journal of Thermal Sciences, 49(11), 2201–2210. https://doi.org/10.1016/j.ijthermalsci.2010.06.009
    • Chicago/Turabian: Author-Date:
      Alhazmy, Majed M. 2010. “Numerical Investigation on Using Inclined Partitions to Reduce Natural Convection inside the Cavities of Hollow Bricks.” International Journal of Thermal Sciences 49 (11): 2201–10. doi:10.1016/j.ijthermalsci.2010.06.009.
    • Harvard:
      Alhazmy, M. M. (2010) ‘Numerical investigation on using inclined partitions to reduce natural convection inside the cavities of hollow bricks’, International Journal of Thermal Sciences, 49(11), pp. 2201–2210. doi: 10.1016/j.ijthermalsci.2010.06.009.
    • Harvard: Australian:
      Alhazmy, MM 2010, ‘Numerical investigation on using inclined partitions to reduce natural convection inside the cavities of hollow bricks’, International Journal of Thermal Sciences, vol. 49, no. 11, pp. 2201–2210, viewed 24 January 2020, .
    • MLA:
      Alhazmy, Majed M. “Numerical Investigation on Using Inclined Partitions to Reduce Natural Convection inside the Cavities of Hollow Bricks.” International Journal of Thermal Sciences, vol. 49, no. 11, Nov. 2010, pp. 2201–2210. EBSCOhost, doi:10.1016/j.ijthermalsci.2010.06.009.
    • Chicago/Turabian: Humanities:
      Alhazmy, Majed M. “Numerical Investigation on Using Inclined Partitions to Reduce Natural Convection inside the Cavities of Hollow Bricks.” International Journal of Thermal Sciences 49, no. 11 (November 2010): 2201–10. doi:10.1016/j.ijthermalsci.2010.06.009.
    • Vancouver/ICMJE:
      Alhazmy MM. Numerical investigation on using inclined partitions to reduce natural convection inside the cavities of hollow bricks. International Journal of Thermal Sciences [Internet]. 2010 Nov [cited 2020 Jan 24];49(11):2201–10. Available from: http://widgets.ebscohost.com/prod/customlink/proxify/proxify.php?count=1&encode=0&proxy=&find_1=&replace_1=&target=http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=a9h&AN=53573332&authtype=sso&custid=s5834912