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http://dx.doi.org/10.3795/KSME-B.2014.38.6.465

Experimental Study on Heat Flux Partitioning in Subcooled Nucleate Boiling on Vertical Wall  

Song, Junkyu (Dept. of Nuclear Engineering, Kyung Hee Univ.)
Park, Junseok (Dept. of Nuclear Engineering, Kyung Hee Univ.)
Jung, Satbyoul (Dept. of Nuclear Engineering, Kyung Hee Univ.)
Kim, Hyungdae (Dept. of Nuclear Engineering, Kyung Hee Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.38, no.6, 2014 , pp. 465-474 More about this Journal
Abstract
To validate the accuracy of the boiling heat flux partitioning model, an experiment was performed to investigate how the wall heat flux is divided into the three heat transfer modes of evaporation, quenching, and single-phase convection during subcooled nucleate boiling on a vertical wall. For the experimental partitioning of the wall heat flux, the wall heat flux and liquid-vapor distributions were simultaneously obtained using synchronized infrared thermometry and the total reflection technique. Boiling experiments of water with subcooling of $10^{\circ}C$ were conducted under atmospheric pressure, and the results obtained at the wall superheat of $12^{\circ}C$ and average heat flux of $283kW/m^2$were analyzed. There was a large difference in the heat flux partitioning results between the experiment and correlation, and the bubble departure diameter and bubble influence factor, which account for a portion of the surrounding superheated liquid layer detached by the departure of a bubble, were found to be important fundamental boiling parameters.
Keywords
Heat Flux Partitioning; Infrared Thermometry; Nucleate Boiling; Total Reflection;
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