Improved Subgrid-scale Models for Large-Eddy Simulation

摘要: The paper analyzes models for subgrid-scale turbulence. analysis indicates that there is sufficient information in the resolved scales to determine some characteristics of complete flow field. kinetic energy small-scale motions can be decomposed into two parts: one results from large and correlated with them, other part uncorrelated which leads a two-component eddy-viscosity model. 'production equals dissipation' argument does not apply small decay turbulence because it account component. exchange between takes place mainly smallest former largest latter; this basis new model shown superior Smagorinsky (1963).