EXPERIMENTAL STUDY OF CONVECTIVE HEAT FLOW THROUGH A LARGE OPENING IN A PARTITIONNED ENCLOSURE

2015 ◽  
Vol 33 (4) ◽  
pp. 211-216
Author(s):  
Yazid SEBBAR
Keyword(s):  
Experimental Study ◽  
Heat Flow ◽  
Convective Heat ◽  
Flow Through ◽  
Large Opening

scholarly journals Experimental Correlations Nu vs Gr.Pr at Varying Widths for Convective Heat Flow Through a Large Aperture in a Full Scale Enclosed Space

2021 ◽  
Vol 39 (5) ◽  
pp. 1643-1648
Author(s):  
Sebbar Yazid Youcef ◽  
Belaidi Abdelkader
Keyword(s):  
Heat Flow ◽  
Convective Heat ◽  
Air Flow ◽  
Simulation Models ◽  
Full Scale ◽  
Neutral Axis ◽  
Large Aperture ◽  
Scale Models ◽  
Flow Through ◽  
Enclosed Space

Convective heat transfer through a large aperture has been studied theoretically and experimentally using reduced scale models for many years. This paper describes the effect of the width of a large opening on the convective heat flow in an enclosure for 5.6×108< Rayleigh number (Ra)<2.8×1010. In our case a full scale realistic calorimetric chamber (5.5m x 2.5m x 2.5m) was used in this study. This chamber contains two zones connected by a large aperture of height H. A hot and cold wall on each side of the aperture will create a temperature difference between the two zones. Empirical equations are expressed in terms of varying door aspect ratio ADS, i.e.: NuPr=(α+βWH)∗Grb, at various temperature differences between the two zones. It was clearly found that as the width decreases the convective flux increases substantially. The instability of the air flow due to the apparition of a small turbulence increased when the opening width gets larger. It was also noticed that the neutral axis (air velocity = 0) goes up when the width of the opening decreases resulting in an acceleration of the air flow above the neutral axis. The liability of these experimental results could be useful for the validation of simulation models.

scholarly journals Determining the heat flow through the cabinet walls of household refrigerating appliances

2021 ◽  
Vol 121 ◽  
pp. 235-242
Author(s):  
Andreas Paul ◽  
Elmar Baumhögger ◽  
Andreas Elsner ◽  
Lukas Moczarski ◽  
Michael Reineke ◽  
...  
Keyword(s):  
Heat Flow ◽  
Flow Through
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