Abstract
Experiments were designed, and experimental equipment was built, to study the characteristics of micro-bubble emission boiling (MEB) in water contacting a copper heating surface 10mm in diameter. The behavior of bubbles on the heating surface was captured by a high-speed video camera. The results of these experiments indicated that after subcooling exceeded 25K, MEB occurred and was accompanied by the emission of numerous extremely small bubbles. During the initial stage of MEB, two different bubble behaviors were observed: a film of vapor on the heating surface expanded and shrank periodically, emitting micro-bubbles, and the film of vapor expanded unevenly before condensing or collapsing into many micro-bubbles. During fully developed MEB, the film of vapor exhibited irregular changes at its surface and partially collapsed in several milliseconds. Nearly simultaneously, a new vapor film layer formed on the heating surface. MEB never occurred during water subcooling when the heating surface was embedded 0.5mm within a ceramic thimble.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Communications in Heat and Mass Transfer
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
