Early evolution of the compressible mixing layer issued from two turbulent streams
TypeArticles dans des revues avec comité de lecture
Direct numerical simulation of the spatially developing mixing layer issuing from two turbulent streams past a splitter plate is carried out under mild compressibility conditions. The study mainly focuses on the early evolution of the mixing region, where transition occurs from a wake-like to a canonical mixing-layer-like behaviour, corresponding to the filling-up of the initial momentum deficit. The mixing layer is found to initially grow faster than linearly, and then at a sub-linear rate further downstream. The Reynolds stress components are in close agreement with reference experiments and follow a continued slow decay till the end of the computational domain. These observations are suggestive of the occurrence of incomplete similarity in the developing turbulent mixing layer. Coherent eddies are found to form in the close proximity of the splitter plate trailing edge, that are mainly organized in bands, initially skewed and then parallel to the spanwise direction. Dynamic mode decomposition is used to educe the dynamically relevant features, and it is found to be capable of singling out the coherent eddies responsible for mixing layer development.
Showing items related by title, author, creator and subject.
A Comparison of Three Techniques to Interact in Large Virtual Environments Using Haptic Devices with Limited Workspace DOMINJON, Lionel; LECUYER, Anatole; BURKHARDT, Jean-Marie; RICHIR, Simon (Springer Link, 2006)This paper describes an experiment that was conducted to evaluate three interaction techniques aiming at interacting with large virtual environments using haptic devices with limited workspace: the Scaling technique, the ...
MARIÉ, Simon; GLOERFELT, Xavier (AIAA, 2015)In this study, a new selective ltering technique is proposed for the Lattice Boltzmann Method. This technique is based on dynamical implementation of the selective filter coefficient . The proposed model makes the latter ...
Experimental analysis of the pressure–velocity correlations of external unsteady flow over rocket launchers MARIE, Simon; DRUAULT, Philippe; LAMBARE, Hadrien; SCHRIJER, Ferry (Elsevier, 2013)Based on simultaneous wall pressure and velocity measurements, the aerodynamic load of a launcher body model is investigated. Two different configurations are considered in order to study the influence of geometrical ...
La méthode I²I « pour l’utilité » : fondements et application à la conception d’une application de réalité virtuelle LOUP-ESCANDE, Emilie; BURKHARDT, Jean-Marie; CHRISTOFOL, Hervé; CHRISTMANN, Olivier; RICHIR, Simon (Congrès International de Génie Industriel, 2011)Résumé - Dans cet article, il est question de décrire une méthode de conception d’artefacts issus des technologies émergentes telle la réalité virtuelle. Partant du constat que la phase d’identification des besoins n’est ...
Anticiper et évaluer l'utilité dans la conception ergonomique des technologies émergentes: une revue LOUP-ESCANDE, Emilie; BURKHARDT, Jean-Marie; RICHIR, Simon (Presses Universitaires de France, 2012)The overall aim of this paper is to outline a review of the concept of useful- ness. In particular, it looks at the facets of usefulness and the methods and tools that could help to develop a useful system from the perspective ...