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Open AccessArticle

Developing a Mathematical Model for Nucleate Boiling Regime at High Heat Flux

Chemical Engineering Department, College of Engineering, King Khalid University, Abha 61411,Kingdom of Saudi Arabia
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Processes 2019, 7(10), 726; https://doi.org/10.3390/pr7100726
Received: 10 September 2019 / Revised: 5 October 2019 / Accepted: 8 October 2019 / Published: 11 October 2019
(This article belongs to the Section Green Processes)
A mathematical model has been developed for heat exchange in nucleate boiling at high flux applying an energy balance on a macrolayer. The wall superheat, macrolayer thickness, and time are the parameters considered for predicting the heat flux. The influence of the wall superheat and macrolayer thickness on average predicts the heat flux. The outcomes of the current model have been compared with Bhat’s constant macrolayer model, and it was found that these models are in close agreement corresponding to the nucleate pool boiling regime. It was concluded that the wall superheat and macrolayer thickness contributed significantly to conduction heat transfer. The average conduction heat fluxes predicted by the current model and by Bhat’s model are in close agreement for a thinner macrolayer of approximately 50 µm. For higher values of the wall superheat, which corresponds to the nucleate pool boiling condition, the predicted results strongly agree with the results of Bhat’s model. The findings also validate the claim that conduction across the macrolayer accounts for the main heat transfer mode from the heater surface to boiling liquid at high heat flux in nucleate pool boiling.
Keywords: mathematical model; energy balance; macrolayer; heat flux mathematical model; energy balance; macrolayer; heat flux
MDPI and ACS Style

Danish, M.; Al Mesfer, M.K. Developing a Mathematical Model for Nucleate Boiling Regime at High Heat Flux. Processes 2019, 7, 726.

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