Turbulence model effect on heat exchange characteristics through the neutron beam window for European spallation source

Purpose - The purpose of this paper is to compare k-ω shear-stress transport (SST) and large eddy simulation (LES) turbulence model application effect on numerical computation of flow pattern and heat exchange characteristics through the neutron beam window region for European spallation source setup model. Design/methodology/approach - Transient hydrodynamic and thermal calculations with appropriate heat sources are performed using both turbulence models and typical discrepancies in flow and thermal patterns are discussed, as well as, simulation results are qualitatively compared with experimental data for heat transfer coefficient distribution a at the window surface. Findings - Contribution of greater k-energy field obtained with LES calculation leads to prediction of more intensive heat transfer in comparison to k-ω SST. Originality/value - The paper illustrates discrepancies of thermal patterns caused by application of k-ω SST and LES turbulent models.