Reynolds-Constrained Large-Eddy Simulation: Sensitivity to Constraint and SGS Models

Reynolds-constrained large-eddy simulation (CLES) method proves to have advantage over traditional large-eddy simulation (LES) approach in both attached and separated turbulent flows, but its sensitivity to the constraint model and base subgrid-scale (SGS) model remains unclear. Here, a comparative study is carried out to clarify the level of dependence of CLES method upon the constraint and base models. Specifically, the Baldwin-Lomax (BL) model, Spalart-Allmaras (SA) model, and Menter's Shear Stress Transport (SST) model are used for the Reynolds constraint models, while Smagorinsky model (SM), Wall-adapting local eddy-viscosity (WALE) model, and Dynamic Smagorinsky model (DSM) for SGS models. The compressible flow past a circular cylinder is simulated at Reynolds number 2 x 10(5) and Mach number 0.75, respectively. It is manifested that the CLES method is sensitive to the constraint models, but less sensitive to the base SGS models, which provides a guideline for further optimization of the CLES method.