Mixed modeling for large-eddy simulation: The single-layer and two-layer minimum-dissipation-Bardina models

Predicting the behavior of turbulent flows using large-eddy simulation requires a modeling subgrid-scale stress tensor. This tensor can be approximated mixed models, which combine dissipative nature functional models with capability structural to approximate out-of-equilibrium effects. We propose mathematical basis mix (functional) eddy-viscosity (structural) Bardina model. By taking an anisotropic minimum-dissipation (AMD) model for eddy viscosity, we obtain (single-layer) AMD–Bardina In order also physics-conforming wall-bounded flows, further develop this into two-layer approach: near-wall region is parameterized model, whereas outer computed The single-layer and are tested in channel at various Reynolds numbers, improved predictions obtained when applied comparison computations AMD alone. results particularly remarkable: both first- second-order statistics extremely well predicted even inflection mean velocity center captured. Hence, very promising simulations moderate high numbers.