Back to Search
Start Over
Simultaneous visualization of dry spots and bubbles for pool boiling of R-113 on a horizontal heater
- Source :
- International Journal of Heat and Mass Transfer. 46:2239-2251
- Publication Year :
- 2003
- Publisher :
- Elsevier BV, 2003.
-
Abstract
- A new experimental attempt was made to simultaneously observe the dynamic behaviors of bubbles and dry spots in the vicinity of boiling surface. Also, the two-dimensional bubble structures were obtained separately. From the visualization results, the formation of bubbles and dry spots occurs simultaneously. At critical heat flux (CHF), the surface rewetting is repeated by the local nucleate boiling around the large vapor film. At just after CHF, nucleate boiling at the locally wetted region is extinguished, resulting in the dryout of the whole heater surface. Therefore, we conclude that CHF is initiated from the locally limited nucleate boiling activity rather than any hydrodynamic instability.
Details
- ISSN :
- 00179310
- Volume :
- 46
- Database :
- OpenAIRE
- Journal :
- International Journal of Heat and Mass Transfer
- Accession number :
- edsair.doi...........da75fc49624ec4f0db44babe5cdfef1f
- Full Text :
- https://doi.org/10.1016/s0017-9310(02)00524-0