THERMAL SCIENCE

International Scientific Journal

Andrijana D. Stojanović

,

Vladimir D. Stevanović

,

Milan M. Petrović

,

Dragoljub S. Živković

NUMERICAL INVESTIGATION OF NUCLEATE POOL BOILING HEAT TRANSFER

ABSTRACT
Multi-dimensional numerical simulation of the atmospheric saturated pool boil-ing is performed. The applied modelling and numerical methods enable a full representation of the liquid and vapour two-phase mixture behaviour on the heated surface, with included prediction of the swell level and heated wall temperature field. In this way the integral behaviour of nucleate pool boiling is simulated. The micro conditions of bubble generation at the heated wall surface are modelled by the bubble nucleation site density, the liquid wetting contact angle and the bubble grow time. The bubble nucleation sites are randomly located within zones of equal size, where the number of zones equals the nucleation site density. The conjugate heat transfer from the heated wall to the liquid is taken in-to account in wetted heated wall areas around bubble nucleation sites. The boiling curve relation between the heat flux and the heated wall surface temperature in excess of the saturation temperature is predicted for the pool boiling conditions reported in the literature and a good agreement is achieved with experimentally measured data. The influence of the nucleation site density on the boiling curve characteristic is confirmed. In addition, the influence of the heat flux intensity on the spatial effects of vapour generation and two-phase flow are shown, such as the increase of the swell level position and the reduced wetting of the heated wall surface by the heat flux increase.
KEYWORDS
pool boiling, heat flux, modelling
PAPER SUBMITTED: 2016-04-04
PAPER REVISED: 2016-07-01
PAPER ACCEPTED: 2016-07-03
PUBLISHED ONLINE: 2016-12-25
DOI REFERENCE: https://doi.org/10.2298/TSCI160404276S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE Supplement 5, PAGES [S1301 - S1312]
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NUMERICAL INVESTIGATION OF NUCLEATE POOL BOILING HEAT TRANSFER

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence