Bubble departure frequency in forced convective subcooled boiling flow
Situ, R., Ishii, M., Hibiki, T., Tu, J.Y., Yeoh, G.H., and Mori, M. (2008) Bubble departure frequency in forced convective subcooled boiling flow. International Journal of Heat and Mass Transfer, 51 (25-26). pp. 6268-6282.
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View at Publisher Website: http://dx.doi.org/10.1016/j.ijheatmasstr...
Forced convective subcooled boiling flow experiments were conducted in a 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 58 test conditions. The non-dimensional analysis was performed on the current data as well as available data from literature. Existing models and correlations were compared with the experimental data of bubble waiting time, growth time, and departure frequency. The correlations developed for pool boiling flow do not work well for forced convective subcooled boiling flow, while the models proposed for subcooled boiling flow cannot predict the bubble departure frequency in wide experimental ranges. Dimensionless bubble departure frequency is correlated with non-dimensional nucleate boiling heat flux. The new correlation agrees reasonably well with existing experimental data at lower wall superheat.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||subcooled boiling; bubble departure frequency; flow visualization; forced convection; bubble waiting time; bubble growth time; bubble departure size|
|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%
|Deposited On:||25 Jun 2012 16:56|
|Last Modified:||25 Jun 2012 16:56|
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