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CHT-04 - Advances in Computational Heat Transfer III. Proceedings of the Third International Symposium
April, 19-24, 2004, on board MS Midnatsol Norwegian Coastal Voyage

DOI: 10.1615/ICHMT.2004.CHT-04


ISBN Print: 978-1-56700-174-7

ISSN: 2578-5486

NATURAL CONVECTIVE HEAT TRANSFER IN A SQUARE CAVITY WITH TIME-VARYING SIDEWALL TEMPERATURE

page 10
DOI: 10.1615/ICHMT.2004.CHT-04.740
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摘要

The natural convective heat transfer in an inclined square enclosure has been numerically studied. The top and bottom horizontal walls were adiabatic, and the right sidewall was maintained at a constant temperature To. The temperature of the opposing vertical wall varied by sine law with time about a mean value To. The system of Navier-Stokes equations in Boussinesq approximation has been solved numerically by control volume method with SIMPLER algorithm. The enclosure have been filled with an air (Pr = 1) and the results have been obtained in the range of inclination angle 0° ≤ α ≤ 90° for two values of Grashof number (2·105 and 3·105). It could be noted that there is a non-zero time-averaged heat flux through the enclosure at α ≠ 0°. The dependencies of time-averaged heat flux on oscillation frequency and inclination angle have been depicted. It has been found that the maximal heat transfer corresponds to the values of inclination angle α = 54° and dimensionless frequency f = 20π for both studied Grashof numbers (2·105 and 3·105).

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