Nucleate pool boiling correlation was developed for five different rib-type roughened tube geometries (including plain tube) with different rib angles of 30 deg, 45 deg, 60 deg, and 90 deg for both distilled water and R-134a as the working media. A scanning electron micrograph (SEM) examination was made for these horizontal roughened tubes. Bubble departure diameter, frequency of bubble emission, and the active nucleation site density with the influence of the rib angle for this type of roughened surface were obtained. Boiling heat flux incorporating natural convection, nucleate boiling, and microlayer evaporation mechanisms following Benjamin and Balakrishnan (1996) was predicted. Heat transfer correlation was also developed in terms of the degree superheat and active nucleation site density. The dependence for these two parameters was found in favorable agreement with that of previous study for smooth surfaces.
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Nucleate Pool Boiling on Ribbed Surfaces With Micro-Roughness at Low and Moderate Heat Flux
S.-S. Hsieh,
S.-S. Hsieh
Department of Mechanical Engineering, National Sun Yat-Sen University, Kaosiung, Taiwan 80424 Republic of China
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C.-J. Weng,
C.-J. Weng
Department of Mechanical Engineering, National Sun Yat-Sen University, Kaosiung, Taiwan 80424 Republic of China
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J.-J. Chiou
J.-J. Chiou
Department of Mechanical Engineering, National Sun Yat-Sen University, Kaosiung, Taiwan 80424 Republic of China
Search for other works by this author on:
S.-S. Hsieh
Department of Mechanical Engineering, National Sun Yat-Sen University, Kaosiung, Taiwan 80424 Republic of China
C.-J. Weng
Department of Mechanical Engineering, National Sun Yat-Sen University, Kaosiung, Taiwan 80424 Republic of China
J.-J. Chiou
Department of Mechanical Engineering, National Sun Yat-Sen University, Kaosiung, Taiwan 80424 Republic of China
J. Heat Transfer. May 1999, 121(2): 376-385 (10 pages)
Published Online: May 1, 1999
Article history
Received:
May 23, 1997
Revised:
December 21, 1998
Online:
December 5, 2007
Citation
Hsieh, S., Weng, C., and Chiou, J. (May 1, 1999). "Nucleate Pool Boiling on Ribbed Surfaces With Micro-Roughness at Low and Moderate Heat Flux." ASME. J. Heat Transfer. May 1999; 121(2): 376–385. https://doi.org/10.1115/1.2825990
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