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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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Bibliographic Details
Published in:Numerical heat transfer. Part A, Applications Applications, 2005-03, Vol.47 (6), p.621-631
Main Authors: Kalabin, E. V., Kanashina, M. V., Zubkov, P. T.
Format: Article
Language:English
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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 ).
ISSN:1040-7782
1521-0634
DOI:10.1080/10407780590896853