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On universal heat transfer relationship for hot-wire data

DOI: 10.1615/ICHMT.2015.THMT-15.320
pages 207-210

E. N. Ganic
Sarajevo School of Science and Technology, Hrasnicka cesta 3a, 71210 Ilidza – Sarajevo, Bosnia and Herzegovina

Philipp S. Zanko
Research Center for Power Engineering Problems, Kazan Scientific Center, Russian Academy of Sciences, 420111, Lobachevsky Str. 2/31, P.O. Box 190, Kazan, Russia

Résumé

A well-known problem of convective heat transfer from a heated wire in a flow of air is studied experimentally using a single sensor hot-wire device with constant overheating relative to ambient temperature. Effect of the temperature difference between the wire and the fluid, the ambient temperature, and the finite length of a wire on the heat transfer is estimated quantitatively. It is shown that the method of cataloguing may be a more adequate tool for heat transfer data analysis in comparison with traditional nondimensional heat transfer relationships Nu=f(Re,Pr).

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