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ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

EXPERIMENTS ON BOILING INCIPIENCE WITH A HIGHLY-WETTING DIELECTRIC FLUID; EFFECTS OF PRESSURE, SUBCOOLING AND DISSOLVED GAS CONTENT

Get access (open in a dialog) DOI: 10.1615/IHTC9.530
pages 337-342

Resumo

An experimental study of pool boiling Incipience using a 0.51 mm diameter cylindrical heater with a silicon boiling surface immersed In an electronic cooling fluid (Fluorinert, FC-72 manufactured by the 3M company) was conducted. The effects of pressure, subcoollng and dissolved gas content on boiling Incipience were systematically investigated. A method, initially proposed by Griffith and Wallls (1959), was revised and used for computing embryonic bubble sizes from the experimental Incipience superheat data. The embryonic bubble radii were nearly the same for all cases studied though the thermodynamic states were quite different. Dissolved gas was found to affect boiling Incipience only at high gas concentrations (> 0.005 moles/mole)