The Importance of Correct Modeling of Bubble Size and Condensation in Prediction of Sub-Cooled Boiling Flows

Abstract

This paper describes the updating of the sub-cooled boiling model with the more recent and better sub-models. The improved sub-models include: Hibiki and Ishii correlation for nucleation site density, Kocamustafaogullari correlation for bubble departure diameter and the S-gamma model of Lo and Rao for bubble size distribution in the flow.The new model has been tested against measured data from Debora and Bartolomei. The results show that improvement in the bubble size prediction has the most significant impact on the accuracy of the model.