Section: New Results

Characterization of model uncertainty for turbulent flows

Participants : Régis Duvigneau, Jérémie Labroquère [THALES] , Emmanuel Guilmineau [CNRS-ECN] , Marianna Braza [CNRS-IMFT] , Mathieu Szubert [CNRS-IMFT] .

The uncertainty related to turbulence modeling is still a bottleneck in realistic flows simulation. Therefore, some studies have been conducted to quantify this uncertainty for two problems in which turbulence plays a critical role. Firstly, the impact of the model choice has been estimated in the case of a massively detached flow over a 2D backward facing step including an oscillatory active control device, whose parameters are optimized [5]. Secondly, the influence of the transition point location has been investigated, in the case of the 3D flow around a bluff-body, using models ranging from RANS to DES models [9], in collaboration with M. Braza from Institut de Mécanique des Fluides de Toulouse, in the context of the M. Szubert's PhD work.