An experimental investigation of transitional natural convection in an air filled cube was conducted in this research. The characteristic dimension of the enclosure is 0.35 m, and data were collected in the middle plane of the cavity. The Rayleigh number range examined is . This was achieved by varying the temperature on the hot and cold walls. The velocity field in the middle plane is measured using particle image velocimetry (PIV). Temperature measurements in the core of the enclosure indicate a linear profile. The average Nu number is also presented and compared against other correlations in the literature. This study attempts to close the gap of available experimental data in literature and provide experimental benchmark data that can be used to validate computational fluid dynamics (CFD) codes since the estimated error from PIV measurements is within 1–2%.
Experimental Investigation of Transitional Natural Convection in a Cube Using Particle Image Velocimetry—Part I: Fluid Flow and Thermal Fields
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received May 28, 2016; final manuscript received June 23, 2016; published online September 20, 2016. Assoc. Editor: Andrey Kuznetsov.
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Georgiou, M. D., Bonanos, A. M., and Georgiadis, J. G. (September 20, 2016). "Experimental Investigation of Transitional Natural Convection in a Cube Using Particle Image Velocimetry—Part I: Fluid Flow and Thermal Fields." ASME. J. Heat Transfer. January 2017; 139(1): 012502. https://doi.org/10.1115/1.4034166
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