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ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

CONVECTION IN A HORIZONTAL FLUID LAYER HAVING A SHEAR-FREE UPPER SURFACE AND UNIFORM VOLUMETRIC ENERGY SOURCES

Get access (open in a dialog) DOI: 10.1615/IHTC7.3000
pages 129-134

Résumé

Measurements have been made of the temperature distribution and heat transfer in a horizontal layer of dilute electrolyte which has a uniformly-distributed volumetric energy source provided by an alternating current passing horizontally through the layer. The flow is driven by bouyancy forces derived from temperature differences in the fluid. The fluid is on a rigid bounding plate maintained at constant temperature. The upper surface of the liquid is in contact with a thin layer of helium to maintain an almost shear-free boundary. The temperature of this liquid-gas interface is maintained equal to the temperature of the lower solid-liquid interface. Horizontally-averaged temperature profiles of the electrolyte are determined with an interferometer. Comparison with results obtained with rigid upper and lower boundaries under similar conditions indicates that with the free upper surface there is a higher heat transfer coefficient at the upper surface, a some-what smaller coefficient at the lower surface, and a decrease in the maximum temperature of the layer.