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FULLY COMPRESSIBLE LARGE-EDDY SIMULATION OF WALL-JET TURBULENT MIXING: IMPROVED BOUNDARY CONDITIONS FOR EDGE, CORNER AND TRANSVERSE FLUXES.

Guido Lodato
Department of Energy and Propulsion INSA- Rouen, UMR-CNRS-6614-CORIA, Campus du Madrillet, Avenue de I'Universite, BP 8 76801 Saint Etienne du Rouvray Cedex, France

Pascale Domingo
CORIA - CNRS & INSA Rouen, BP 8, 76801 Saint-Etienne-du-Rouvray, France

Luc Vervisch
CORIA - CNRS & INSA Rouen, BP 8, 76801 Saint-Etienne-du-Rouvray, France

Abstract

Fully compressible Large-Eddy Simulation (LES) of high Reynolds impinging round-jet is performed in order to assess the impact of both inlet profiles and boundary conditions on turbulence development. The modification to the Navier-Stokes Characteristic Boundary Conditions (NSCBC) proposed by Yoo et al. (2005) is extended to the 3D problem and a specific treatment for the computational domain edges and corners is proposed together with compatibility conditions for inlet/outlet and wall/outlet joining regions. Comparisons of the statistical results against the experimental data demonstrate the effectiveness of the proposed improvement, which allows for reproducing mean flow velocity up to the computational domain limits.