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Natural convection flow and heat transfer in an enclosure containging staggered arragement of blockages.

Iyi, Draco; Hasan, Reaz

Authors

Draco Iyi

Reaz Hasan



Abstract

The work reported in this paper is a numerical study of airflow and heat transfer for low turbulence buoyancy-driven flow in a rectangular cavity partially filled with solid objects. The two vertical walls were maintained at constant temperatures giving a temperature differential of 42.2 {deg}C resulting in a characteristic Rayleigh number of 1.45 {D7} 109. Two different types of blockage arrangements were considered for analysis, and these consist of In-line and Staggered arrangements of 12 {D7} 6 and 12 {D7} 3 objects. In all cases, steady state flow and wall heat transfer data at the mid-height and mid-width of the cavity are presented. The flow domain displayed a stable core region and the average core temperature was found to be strongly influenced by different stacking arrangement of solid objects. In general, the staggered arrangement resulted in lower heat transfer through the surfaces which is linked with the suppression of turbulence within the boundary layers close to the surfaces.

Journal Article Type Conference Paper
Start Date Dec 19, 2014
Publication Date Jun 11, 2015
Journal Procedia engineering
Print ISSN 1877-7058
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 105
Pages 176-183
Institution Citation IYI, D. and HASAN, R. 2015. Natural convection flow and heat transfer in an enclosure containging staggered arragement of blockages. Procedia engineering [online], 105: proceedings of the 6th BSME international conference on thermal engineering (ICTE 2014), 19-21 December 2014, Dhaka, Bangladesh, pages 176-183. Available from: https://doi.org/10.1016/j.proeng.2015.05.033
DOI https://doi.org/10.1016/j.proeng.2015.05.033
Keywords Low turbulenc; Natural convection; Heat transfer; CFD; Product stacking and arrangement

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