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Title: Heat transfer reduction due to a ceiling-mounted barrier in an enclosure with natural convection
Authors: Gediz İliş, Gamze
Mobedi, Moghtada
Öztop, Hakan Fehmi
Keywords: Heat transfer
Rayleigh number
Nusselt number
Issue Date: 2011
Publisher: Taylor and Francis Ltd.
Source: Gediz İliş, G., Mobedi, M., and Öztop, H. F. (2011). Heat transfer reduction due to a ceiling-mounted barrier in an enclosure with natural convection. Heat Transfer Engineering, 32(5), 429-438. doi:10.1080/01457632.2010.483889.
Abstract: Effects of a ceiling-mounted barrier on natural convection heat transfer in a square cavity with differentially heated wall are numerically investigated. A limit case, in which the partition has small thickness and low thermal conductivity, is studied. The study is performed for nine different locations of barrier on the ceiling, two different lengths of barrier as 15 and 50% of the side wall, and Rayleigh numbers from 103 to 106. The vorticity and streamfunction approach is used to obtain velocity distribution, and the energy equation is solved to determine temperature field in the cavity. The variations of the local Nusselt number on the hot and cold walls and the change of mean Nusselt number with the location of barrier in the cavities with different Rayleigh numbers are presented. The obtained results show that a wall-mounted barrier can be used to reduce heat transfer rate through the cavity; however, its effectiveness depends on length and location of barrier and Rayleigh number.
ISSN: 1521-0537
Appears in Collections:Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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