Simulation the OECD/NEA international «COLD LEG MIXING CFD-UQ» benchmark by the LOGOS software package

The paper presents the results of simulation by the domestic software package Logos developed by FSUE «RFNC-VNIIEF» international OECD/NEA «Cold Leg Mixing CFD-UQ» benchmark dedicated to the study of mixing phenomena in the presence of density gradients at the experimental facility located at Texas A&M University (TAMU). The main objective of the benchmark is to analyze the applicability of CFD methods to simulation mixing processes with the influence of buoyancy forces under Pressure Thermal Shock event, which is of great importance from the point of view of nuclear safety. Based on the calculations of an open test with known experimental data, approaches to modeling have been worked out, which are used to calculate the «blind» test. A qualitative comparison of the calculated profiles with the available experimental data of the «blind» test is carried out. An uncertainty analysis was carried out to assess the influence of input data on the results of modeling a «blind» test.

Keywords

Authors

References