A posteriori study of Thermal-Large Eddy Simulation in solar receiver operating conditions

We study Thermal-Large Eddy Simulations (T-LES) of anisothermal and turbulent channel flows. The studied physical condition represent solar receiver operating conditions. T-LES are compared to Direct Numerical Simulation (DNS) a posteriori. We solve the low-Mach number Navier-Stokes equations. 5 two-layered mixed models and 7 functional models are assessed. All models are based on the Anisotropic Minimum Dissipation (AMD) model. The effect of different numerical schemes is highlighted. A global error rate is shown for all 12 studied models. Four models are selected for a detailed analysis. The effect of the mesh, numerical scheme and model used is shown. Results show good agreement of a two-layered mixed model using the AMD---Bardina, AMD scalar---Bardina model. The mixed models based on the Gradient models show poor performance on all three meshes.