Synchronized High-Speed Video, Infrared Thermometry, and Particle Image Velocimetry Data for Validation of Interface-Tracking Simulations of Nucleate Boiling
نویسندگان
چکیده
Nucleation, growth and detachment of steam bubbles during nucleate boiling of a water pool at atmospheric pressure is experimentally investigated using a combination of synchronized high-speed video (HSV), infrared (IR) thermography and particle image velocimetry (PIV). The heater is a thin (<1 m), horizontal (20×10 mm 2 ), resistively-heated, indium-tin-oxide (ITO) film, vacuum-deposited on a sapphire substrate (250 m thick), which allows for unobstructed optical access from below the boiling surface. This approach enables detailed measurement of the phase, temperature and velocity distributions on and above the boiling surface. The database reported herein is for isolated bubbles, exhibiting nucleation temperatures 107-109C, bubble departure diameters 3.0-3.8 mm, frequencies 4.7-15.00 Hz, wait and growth times 52-200 ms and 15-16 ms, respectively, at average heat fluxes 29-36 kW/m 2 . The database is most useful for validation of modern simulations of nucleate boiling in which the phase, temperature and velocity distributions within and around bubbles are resolved using interface capturing methods such as Volume Of Fluid (VOF), Level Set (LS) and Front Tracking (FT).
منابع مشابه
Study of bubble growth in water pool boiling through synchronized, infrared thermometry and high-speed video
High-speed video and infrared thermometry were used to obtain timeand space-resolved information on bubble nucleation and heat transfer in pool boiling of water. The bubble departure diameter and frequency, growth and wait times, and nucleation site density were directly measured for a thin, electrically-heated, indium-tin-oxide surface, laid on a sapphire substrate. These data are very valuabl...
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