Development of the Multi-dimensional Fluid Dynamics Code and Benchmarking for the Natural Circulation Problem

In the analysis of two-fluid model, the interfacial area concentration (IAC) is one of the most important parameters with respect to the interfacial transfer terms between two phases. Recently, instead of the conventional static approach for modeling IAC, the IAC transport equation was developed for adiabatic bubbly flow or nucleate boiling flow. This study is a part of the development of computational fluid dynamics code for analyzing the boiling flow with two-fluid model and IAC transport equation. Multi-dimensional approach was utilized in order to overcome the limitation in one-dimensional modeling for the IAC transport equation. The problem for single-phase natural circulation was used for benchmarking of the code as a first step for checking the robustness of the developed code