Investigation of flow boiling heat transfer and boiling crisis on a rough surface using infrared thermometry
Name
IR flow boiling rough surfaces R1.pdf
Description
Accepted version
Size
1.98 MB
Format
Adobe PDF
Checksum (MD5)
47d8b341b3da0b5f7373be08778386e8
Author(s)
Su, G-Y
Wang, C
Zhang, L
Seong, JH
Kommajosyula, R
Phillips, B
Bucci, M
Date Issued
2020
Journal
International Journal of Heat and Mass Transfer
Publisher
Elsevier BV
Citation
Su, G-Y, Wang, C, Zhang, L, Seong, JH, Kommajosyula, R et al. 2020. "Investigation of flow boiling heat transfer and boiling crisis on a rough surface using infrared thermometry." International Journal of Heat and Mass Transfer, 160.
Version
Author's final manuscript
Abstract
© 2020 Elsevier Ltd We design and build a special heater to enable infrared investigations of boiling heat transfer on surfaces featuring the typical roughness and scratch pattern of commercial-grade heat transfer surfaces (in this case a zirconium alloy typically used as fuel cladding material in nuclear reactors). We use high-speed infrared thermometry to investigate surface effects on the boiling process for both the rough infrared heater and a reference more conventional, nano-smooth infrared heater. Compared to the nano-smooth surface, the rough surface has larger nucleation sites, which require a lower nucleation temperature. The rough surface has a much smaller bubble departure volume. However, it has a much higher nucleation site density, and, overall, a higher heat transfer coefficient. We capture this behavior with a stochastic heat flux partitioning model. Notably, while the two surfaces have very different boiling dynamics, the boiling crisis has a common “signature”. For both surfaces, the probability density functions of bubble footprint areas follow a power law with a negative exponent smaller than 3, also known as a scale-free distribution. We predict these observations and the onset of the boiling crisis using a continuum percolation model. These results corroborate the hypothesis of the boiling crisis as a percolative critical phase transition of the bubble interaction process.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/J.IJHEATMASSTRANSFER.2020.120134
