Abstract
Extensive measurements of the coefficient of electroconvective heat transfer have been carried out in gases: air, Ar, N2, O2, freon-12 and freon-22, using a single platinum wire mounted along the axis of a copper cylinder. The diameter of the cylinder was 53 mm, while that of the wire was 0.025 mm. Electroconvective heat transfer coefficients have been measured as a function of electric field, pressure, orientation and frequency of the applied electric field in the earth's gravitational field. The results reveal a complicated interaction between the electric-field gradient and thermal convection. The present work indicates that the Senftleben mechanism alone cannot account for the observed phenomena.
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