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A simplified energy dissipation based model of heat transfer for post-dryout flow boiling

Abstrakt

model for post dryout mist flow heat transfer is presented based on considerations of energy dissipation in the flow. The model is an extension of authors own model developed earlier for saturated and subcooled flow boiling. In the former version of the model the heat transfer coefficient for the liquid singlephase convection as a reference was used, due to the lack of the appropriate model for heat transfer coefficient for the mist flow boiling. That issue was a fundamental weakness of the former approach. The purpose of present investigation is to fulfil this drawback. Now the reference heat transfer coefficient for the saturated flow boiling is that corresponding to vapour flow the end of the mist flow. The wall heat flux is based on partitioning and constitutes of two principal components, namely the convective heat flux for vapour flowing close to the wall and two phase flow droplet–vapour in the core flowing. Both terms are accordingly modelled. The results of calculations have been compared with some experimental correlations from literature showing a good consistency.

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Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuł w czasopiśmie wyróżnionym w JCR
Opublikowano w:
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER nr 124, strony 260 - 268,
ISSN: 0017-9310
Język:
angielski
Rok wydania:
2018
Opis bibliograficzny:
Mikielewicz J., Mikielewicz D.: A simplified energy dissipation based model of heat transfer for post-dryout flow boiling// INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER. -Vol. 124, (2018), s.260-268
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.ijheatmasstransfer.2018.03.063
Weryfikacja:
Politechnika Gdańska

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