RAYLEIGH-TAYLOR-INDUCED TURBULENT MIXING LAYERS etc15 Tracking Number 31Presentation: Session: Reacting and compressible flows Room: Room F Session start: 13:30 Wed 26 Aug 2015 Nicolas Schneider nicolas.schneider@cea.fr Affifliation: CEA, DAM, DIF, 91297 Arpajon, France, EU Serge Gauthier serge.gauthier@orange.fr Affifliation: CEA, DAM, DIF, 91297 Arpajon, France, EU Topics: - Reacting and compressible turbulence, - Transport and mixing Abstract: We study mixing layers generated by Rayleigh-Taylor instability. It develops in various physical situations, such as supernovae explosions and inertial confinement fusion, which aims at obtaining thermonuclear ignition by compressing a pellet filled with deuterium-tritium. The numerical simulations we have carried out start from rest and several physical models are involved: Boussinesq, anelastic, and compressible. This allows for a wide exploration of parameters. Results from DNS spectral simulations with around 900 millions collocation points are presented. Anisotropy, compressibility effects, characteristics of turbulence and mixing, are explored. |