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ISSN Online: 2377-424X

ISBN Print: 0-89116-559-2

International Heat Transfer Conference 8
August, 17-22, 1986, San Francisco, USA

EXPERIMENTAL STUDY OF FREE CONVECTION HEAT TRANSFER FROM AN INCLINED FINE WIRE TO AIR

Get access (open in a dialog) DOI: 10.1615/IHTC8.2760
pages 1323-1328

Résumé

Average heat transfer coefficient of free convection from an inclined platinum wire of 50.4 μm in diameter and 270 mm in length to air has been measured in the range of temperature difference Tw − T = 17~742 K. In the case where the wire is inclined at an angle φ ( 0° <φ ≤85°) to the horizontal, experimental data can be correlated by an expression which is derived by replacing gravitational acceleration g with g cosφ in the expression for a horizontal wire. In the case where the wire is inclined at an angle of a few degrees to the vertical, the data are scarcely affected by the inclination and can be correlated by the expression for a vertical wire.
It is also confirmed that the effect of the magnitude of air space on heat transfer is negligible and the physical properties at the film temperature are adequate for use in the dimensionless expression.