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Proceedings Paper

Measurement of instantaneous heat transfer using a hot-foil infrared technique
Author(s): Ansgar Leefken; Faruk Al-Sibai; Ulrich Renz
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Paper Abstract

Hot-foil infrared thermography was employed to measure instantaneous local heat transfer coefficients of falling wavy films. The film flows down an electrically heated thin metal foil which provides a defined heat flux. The heat transfer coefficient of the film flow is evaluated from the temperature on the backside of the foil measured by an infrared camera. Good agreement of the instantaneous measurements with own numerical calculations points out the remarkable sensitivity and time resolution of the technique. The accuracy of the results is confirmed by comparison with recently published time averaged data.

Paper Details

Date Published: 23 March 2001
PDF: 9 pages
Proc. SPIE 4360, Thermosense XXIII, (23 March 2001); doi: 10.1117/12.421013
Show Author Affiliations
Ansgar Leefken, Rheinisch Westfaelische Technische Hochschule Aachen (Germany)
Faruk Al-Sibai, Rheinisch Westfaelische Technische Hochschule Aachen (Germany)
Ulrich Renz, Rheinisch Westfaelische Technische Hochschule Aachen (Germany)


Published in SPIE Proceedings Vol. 4360:
Thermosense XXIII
Andres E. Rozlosnik; Ralph B. Dinwiddie, Editor(s)

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