Higher-order large eddy simulations for engineering applications and science

Understanding turbulent flows in various regimes is crucial in science and in engineering applications. Large eddy simulations (LES) provide useful insights about the complex flow physics of turbulent flows since it resolves the large scales and models only the smallest or subgrid scales. The goal of this work is to present some key results of higher-order LES for a variety of flow regimes conducted on highly parallel HPC clusters. The results cover versatile flow regimes, such as, subsonic, and supersonic flow; wall-bounded and external flow; incompressible and compressible flow; rotating and non-rotating flow; Newtonian, non-Newtonian flow as in hemodynamics. Various important aspects are discussed, and the focus is given on improving the physics-capture using accurate boundary conditions, meshing and resolving near-wall regions. Spatial, temporal discretization and resolved to total Turbulent Kinetic Energy (TKE) ratios are discussed. Sufficiently long computational times are used to obtain most relevant details. Comparisons with experimental data are made where available. Turbulence capture using LES for a wide range of Reynolds numbers is demonstrated.