Looking for turbulence structures: a numerical exploration

The purpose of this paper, dedicated to the memory of our friend Hieu Ha Minh, is to wander through the turbulence universe using deterministic computational tools based on large-eddy simulations (LES) in physical and spectral space. We first briefly recall the subgrid models used, then apply them to mixing layers, jets, separated flows (the backstep in particular, on which Hieu worked a lot) and boundary layers. The influence of compressibility will be also considered. These fine-grain LES allow us to decipher very nicely the intimate vortical structure of turbulence, and predict their statistics. Finally, we discuss of the applicability of these methods to industrial flows