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NATURAL-CONVECTIVE HEAT TRANSFER IN A SQUARE CAVITY WITH TIME-VARYING SIDE-WALL TEMPERATURE
The natural-convective heat transfer in an inclined square enclosure is studied numerically. The top and bottom horizontal walls are adiabatic, and the right side wall is maintained at a constant temperature T 0 . The temperature of the opposing vertical wall varies by sine law with time about a mea...
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Published in: | Numerical heat transfer. Part A, Applications Applications, 2005-03, Vol.47 (6), p.621-631 |
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Main Authors: | , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The natural-convective heat transfer in an inclined square enclosure is studied numerically. The top and bottom horizontal walls are adiabatic, and the right side wall is maintained at a constant temperature
T
0
. The temperature of the opposing vertical wall varies by sine law with time about a mean value
T
0
. The system of Navier-Stokes Equations in Boussinesq approximation is solved numerically by the control-volume method with SIMPLER algorithm. The enclosure is filled with air (Pr = 1) and results are obtained in the range of inclination angle 0° ≤
α
≤ 90° for two values of Grashof number (2 × 10
5
and 3 × 10
5
). It can be noted that there is a nonzero time-averaged heat flux through the enclosure at
α
≠ 0°. The dependencies of time-averaged heat flux on oscillation frequency and inclination angle are depicted. It is found that the maximal heat transfer corresponds to the values of inclination angle
α
= 54
○
and dimensionless frequency f = 20
π
for both Grashof numbers studied (2 × 10
5
and 3 × 10
5
). |
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ISSN: | 1040-7782 1521-0634 |
DOI: | 10.1080/10407780590896853 |