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Natural convection in enclosures with partial partitions

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  • Bilgen, E.

Abstract

Laminar and turbulent natural convection in enclosures with partial partitions has been studied by a numerical method. Vertical boundaries were isothermal and horizontal boundaries were adiabatic. Two dimensional equations of conservation of mass, momentum and energy, with the Boussinesq approximation are solved using the Simpler method. Various geometrical parameters were: aspect ratio A=0.3 to 0.4, partition position D=0.5−0.6, height of the partitions C=D=0 to 0.15. The Rayleigh number was varied from 104 to 1011. The results are reduced in terms of the normalized Nusselt number as a function of the Rayleigh number, and other non dimensional geometrical parameters. The isotherms and streamlines are produced for various Rayleigh numbers and geometrical conditions. Heat transfer correlations useful for practical design problems have been derived.

Suggested Citation

  • Bilgen, E., 2002. "Natural convection in enclosures with partial partitions," Renewable Energy, Elsevier, vol. 26(2), pages 257-270.
    • Handle: RePEc:eee:renene:v:26:y:2002:i:2:p:257-270
    DOI: 10.1016/S0960-1481(00)00206-8
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    Cited by:

    1. Antar, Mohamed A., 2010. "Thermal radiation role in conjugate heat transfer across a multiple-cavity building block," Energy, Elsevier, vol. 35(8), pages 3508-3516.
    2. Wu, Ying-Ying & Wu, Shuang-Ying & Xiao, Lan, 2018. "Heat dissipation characteristics from photovoltaic cells within the partitioned or non-partitioned glazed cavity to the windy environment," Renewable Energy, Elsevier, vol. 127(C), pages 642-652.
    3. Ngo, L.C. & Bello-Ochende, T. & Meyer, J.P., 2015. "Numerical modelling and optimisation of natural convection heat loss suppression in a solar cavity receiver with plate fins," Renewable Energy, Elsevier, vol. 74(C), pages 95-105.
    4. Fabio Nardecchia & Benedetta Mattoni & Francesca Pagliaro & Lucia Cellucci & Fabio Bisegna & Franco Gugliermetti, 2016. "Computational Fluid Dynamic Modelling of Thermal Periodic Stabilized Regime in Passive Buildings," Sustainability, MDPI, vol. 8(11), pages 1-18, November.

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