Abstract
For the advanced liquid metal cooled pool-type reactors, natural circulation of coolant is essentially important to ensure reactor safety under either normal or accident conditions, thus the thermal-hydraulic analysis of natural circulation behaviors is significant. Compared with the commercial Computational Fluid Dynamics (CFD) software, such ANSYS Fluent, OpenFOAM is one of the most common open-source CFD codes, which has more free programming environment and advantages of convenient function development. In this study, a new solver GTFoam for the natural circulation simulation was developed by adding energy conservative equation model and natural circulation model into the original icoFoam solver of OpenFOAM. For the above GTFoam solver, code verification was carried out by using the square cavity flow driven by regional heat source, and results were compared with the ones calculated by ANSYS Fluent. It was demonstrated that the results simulated by GTFoam solver agreed well with the ones calculated by ANSYS Fluent. This study can be used in the further development of transient safety analysis solver based on OpenFOAM for LFR in our future work.
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