نوع مقاله : پژوهشی اصیل
موضوعات
عنوان مقاله English
نویسندگان English
In this research a new fully implicit numerical scheme has been developed for the simulation of transient two-phase flow in a vertical channel. The development of multi-scale modeling capabilities through the use of thermal-hydraulic coupled systems and numerical fluid dynamics methods and the Jacobin-Krylov method has been investigated in this article. Here, the two-phase mixture of saturated steam and incompressible gas (steam-air mixture) is considered as a whole and the volume of fluid (VOF) model is used. Also, the RNG k-Ɛ turbulence model is used and the wall boiling phenomenon is modeled with the partitioned heat flux model. The purpose of this study is to check the validity, accuracy and use of the developed numerical model. This study also confirms the capability of the developed tool to predict the impact of such phenomena on system behavior and to record the development of thermal stratification in a plenum with low mass flow. Comparing our results with the existing results is applicable for investigating thermohydraulic transients without stability limitations and the model developed in this research is simpler, more accurate and faster than other methods
کلیدواژهها English
