A CFD Benchmarking Exercise Based on Flow Mixing in a T-Junction

Abstract

The paper describes an international benchmarking exercise, sponsored by the OECD Nuclear Energy Agency, aimed at testing the ability of state-of-the-art Computational Fluid Dynamics (CFD) codes to predict the important flow parameters affecting high-cycle thermal fatigue induced by turbulent mixing in T-junctions. Numerical simulations were compared against measured data from an experiment performed at 1:2 scale by Vattenfall Research and Development, Älvkarleby, Sweden. The test data were released only at the end of the exercise. Details of the organizational procedures, the experimental set-up and instrumentation, the different modeling approaches adopted, synthesis of results and overall conclusions and perspectives are presented.