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International Heat Transfer Conference 3

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

NATURAL CONVECTION HEAT TRANSFER BETWEEN VERTICAL FLAT PLATES WITH UNIFORM HEAT FLUX

T. S. Lauber
General Electric Company Philadelphia, Pa. and Pittsfield, Mass.

A. U. Welch
General Electric Company Philadelphia, Pa. and Pittsfield, Mass.

DOI: 10.1615/IHTC3.930
pages 126-131

Abstract

Combined free and forced convection between vertical, parallel, flat plates open top and bottom is investigated for uniform but asymmetrical heat flux. Laminar, fully developed flow is assumed. Effect of surrounding fluid being at a temperature above bottom temperature is considered. Fluid temperature rise through the passage is considered a dependent quantity and can be found explicitly from the results. Tests of large size power transformer windings in oil show that analytical results are applicable for Rayleigh numbers less than 150. For Rayleigh numbers above 150 turbulence and entrance effects make the results inapplicable.

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