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International Heat Transfer Conference 13

ISBN Imprimir: 1-56700-226-9 (CD)
ISBN En Línea: 1-56700-225-0

BUBBLE COALESCENCE IN POOL BOILING ON A THIN FOIL INVESTIGATED BY HIGH-SPEED IR THERMOGRAPHY

DOI: 10.1615/IHTC13.p28.400
page 13

Iztok Golobic
Faculty of Mechanical Engineering, University of Ljubljana, Aškerceva cesta 6, SI-1000 Ljubljana, Slovenia

Matej Baselj
Faculty of Mechanical Engineering, University of Ljubljana, Ljubljana, Slovenia

A. Papez
Faculty of Mechanical Engineering, University of Ljubljana, Ljubljana, Slovenia

J. Petkovsek
Faculty of Mechanical Engineering, University of Ljubljana, Ljubljana, Slovenia

D. B. R. Kenning
School of Engineering and Design, Brunel University, Uxbridge, West London, United Kingdom ; Department of Engineering Science Oxford University, Oxford, OX1 3PJ, UK

Sinopsis

Bubble coalescence events have been examined during pool nucleate boiling of water on thin, electrically-heated metal foils. Wall temperature measurements by high-speed IR camera synchronized with high-speed video camera recordings of the bubble motion have improved on the temporal and spatial resolution of previous observations by liquid crystal thermography. There was no evidence of long-range disturbances to the wall temperature beyond the immediate vicinity of the bubbles. Examples are given of the variations in wall temperature and heat flux during different types of coalescence.

IHTC-13 Digital Library

Measurement of fluid temperature with an arrangement of three thermocouples FLOW BOILING OF A HIGHLY VISCOUS POLYMER SOLUTION