Development of mechanistic model for CHF based on boiling crisis process

Accurate prediction of critical heat flux (CHF) is significant in the design and operation of boiling heat transfer equipment. In response to this issue, a mechanistic CHF model, also called the double-wave model, is proposed based on detailed experimental visualization. Based on energy conservation at wave trough, a new mechanistic model is solved through a mechanistic modeling approach. The prediction results of the mechanistic CHF model are in good agreement with the experimental results, with mean error (ME), mean absolute error (MAE), and root mean square error (RMSE) of 11.7%, 15.8%, and 18.4%, respectively. In addition, the double-wave model has a good predictive ability on the results of different researchers. The relevant research in this paper provides an important foundation for safety assessment of thermal systems and boiling heat transfer enhancement. © 2024 Elsevier Ltd.