New Approach to Validate Subgrid Models in Complex High Reynolds Number Flows

摘要

The overall objective was to develop new and advanced subgrid models that can beused for large-eddy simulations (LES) of high Reynolds number flows in complex geometries. This study was motivated by the fact that subgrid models for LES of high Reynolds number flows currently do not exist. Methods that use data from direct numerical simulations (DNS) to validate sub grid models cannot be used for high Reynolds number flows. In this research, techniques that do not require DNS results for evaluating the subgrid model capabilities were employed in physical space to evaluate subgrid models. A new local dynamic model was also developed in this study. The overall technical objectives of this research were: 1 To develop technique(s) to analyze the behavior of subgrid models in physical space. 2 To demonstrate the analysis technique(s) for high Reynolds number flows. 3 To use the analysis techniques to optimize and develop new subgrid models for high Reynolds number flows in complex domains. All the above objectives have been successfully achieved in this research.