Host: The Japan Society of Mechanical Engineers
Name : The 30th International Conference on Nuclear Engineering (ICONE30)
Date : May 21, 2023 - May 26, 2023
In this paper, the transport phenomena and heat transfer mechanisms associated with saturated flow boiling of water in a large aspect ratio narrow channel were computationally investigated. A two-dimensional computational model has been developed for analysis of the interfacial behavior of flow boiling with flow patterns transiting from bubbly to full confined slug flow in the narrow rectangular channel based on the multi-phase volume of fluid (VOF) model combined with phase change model. The numerical results are compared with visualized experimental results of detailed information on flow pattern and phase distribution. The computed results show reasonable agreement with experimentally captured interfacial behavior. The experimental and numerical results provide better understanding of the mechanisms of flow boiling heat transfer in narrow channels. Moreover, the established numerical modelling framework in the present paper can provide an alternative and a promising tool for the design and optimization of compact heat exchangers with narrow channels such as in the integrated small modular reactors (SMR) or other industrial applications.
