Nucleation and Growth Characteristics of Bubble in Subcooled Flow Boiling in Microchannel

Abstract:

Dynamic characteristics of micro bubble are the key for its applications. A thermal bubble is produced on the wall of microchannel with flowing fluid. Generation of bubble, including nucleation and growth, is observed and measured with different volume flow rates. The results show that nucleation becomes more difficult and instable with volume flow rate increasing. Bubble growth could be divided into three stages, while the second stage becomes shorter and even disappears as volume flow rate increasing. When volume flow rate increases suddenly, bubble shrinks, and it is more remarkable for larger volume flow rate. Furthermore it needs more time for bubble to reach and keep the minimum volume.

• Periodical: Key Engineering Materials (Volumes 609-610)
• Pages: 611-616
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.609-610.611
• Online since: April 2014
• Authors: Chao Qiu, Hui Chen Zhang*
• Keywords: Bubble, Growth, Micro-Fluid, Nucleation, Volume Flow Rate

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