Bubble departure in forced convective subcooled boiling flow

Situ, Rong, Tu, Jiyuan, Yeoh, Guan Heng, Park, Goon Cherl , Hibiki, Takashi, and Ishii, Mamoru (2006) Bubble departure in forced convective subcooled boiling flow. In: Proceedings of 13th International heat Transfer Conference. From: The 13th International heat Transfer Conference, 13-18 August 2006, Sydney, Australia.

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Abstract

Forced convective subcooled boiling flow experiments were conducted in a BWR-scaled vertical upward annular channel. Water was used as the testing fluid, and the tests were performed at atmospheric pressure. A high-speed digital video camera was applied to capture the dynamics of the bubble nucleation process. Bubble departure frequencies were obtained from the video for a total of 92 test conditions. The departure frequency increases as the increase of inlet temperature or heat flux, or the decrease of inlet fluid velocity. A force balance analysis of a growing bubble was performed to predict the bubble departure size to be around 10-4 m. The departure frequency is modelled by taking account of transient heat conduction and bubble growth rate. Comparison with experiments suggests that departure frequency falls into two regions: subcooled region and saturate region. The proposed bubble departure frequency model agreed fairly well with the experimental data.

Item ID: 21537
Item Type: Conference Item (Refereed Research Paper - E1)
ISBN: 1-56700-226-9
Date Deposited: 20 Aug 2012 05:01
FoR Codes: 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics @ 50%
09 ENGINEERING > 0915 Interdisciplinary Engineering > 091505 Heat and Mass Transfer Operations @ 50%
SEO Codes: 85 ENERGY > 8504 Energy Transformation > 850403 Nuclear Energy @ 50%
85 ENERGY > 8507 Energy Conservation and Efficiency > 850701 Commercial Energy Conservation and Efficiency @ 50%
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