The present study is an experimental and numerical analysis on the natural convection of air in square enclosures with partially active side walls. The experimental equipment is based on two different systems: an holographic interferometer and a 2D-PIV. The test cell is a square enclosure filled of air with vertical partially active side walls at different temperatures. The hot and cold regions on these sides are located in the middle of the cavity. The remaining vertical walls are made up of glass to allow an optical access to the cavity. The top and bottom surfaces of the enclosure are made up of plexiglas to reduce heat leakages. The experimental study is carried out both through the holographic interferometry, in order to obtain the average Nusselt numbers at different Rayleigh numbers, and through the 2D-PIV, in order to analyse the dynamic behaviour of the phenomenon at the same Rayleigh numbers. The average Nusselt numbers are obtained measuring the temperature distribution in the air layer trough the real-time and double-exposure holographic interferometry; the dynamic structures are the velocity vector distribution, the streamlines and the velocity maps. Finally these experimental data are compared to the results obtained through a numerical study carried out using the finite volume code, Fluent 6.2.3. The aim of this comparison is the validation of the numerical procedure. In this way it is possible to use the numerical code to enlarge the Rayleigh number range.
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ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences
July 19–23, 2009
San Francisco, California, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4358-1
PROCEEDINGS PAPER
A 2D-PIV Study on Natural Convective Heat Transfer in a Square Enclosure With Partially Active Side Walls
Massimo Paroncini,
Massimo Paroncini
Universita` Politecnica delle Marche, Ancona, Italy
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Francesco Corvaro,
Francesco Corvaro
Universita` Politecnica delle Marche, Ancona, Italy
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Alessia Montucchiari
Alessia Montucchiari
Universita` Politecnica delle Marche, Ancona, Italy
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Massimo Paroncini
Universita` Politecnica delle Marche, Ancona, Italy
Francesco Corvaro
Universita` Politecnica delle Marche, Ancona, Italy
Alessia Montucchiari
Universita` Politecnica delle Marche, Ancona, Italy
Paper No:
HT2009-88438, pp. 897-905; 9 pages
Published Online:
March 12, 2010
Citation
Paroncini, M, Corvaro, F, & Montucchiari, A. "A 2D-PIV Study on Natural Convective Heat Transfer in a Square Enclosure With Partially Active Side Walls." Proceedings of the ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences. Volume 3: Combustion, Fire and Reacting Flow; Heat Transfer in Multiphase Systems; Heat Transfer in Transport Phenomena in Manufacturing and Materials Processing; Heat and Mass Transfer in Biotechnology; Low Temperature Heat Transfer; Environmental Heat Transfer; Heat Transfer Education; Visualization of Heat Transfer. San Francisco, California, USA. July 19–23, 2009. pp. 897-905. ASME. https://doi.org/10.1115/HT2009-88438
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