EXPLORING THE EFFECTS OF A RIGID BODY ON THE EVOLUTION OF THE RAYLEIGH-TAYLOR INSTABILITY etc15 Tracking Number 505Presentation: Session: Instability and Transition 7 Room: Room A Session start: 10:30 Fri 28 Aug 2015 Chris Brown cb733@cam.ac.uk Affifliation: University of Cambridge Stuart Dalziel s.dalziel@damtp.cam.ac.uk Affifliation: University of Cambridge Topics: - Instability and transition Abstract: This talk discusses the effects of a rigid solid boundary impeding the evolution of the Rayleigh-Taylor (RT) instability. The introduction of an obstacle completely alters the evolution of RT growth, instead of mixing the domain rapidly, a quasi-steady flow, rich in dynamics is established for long periods of time. Using a combination of low Atwood number experiments and ILES simulations, this talk will present a non-dimensional analytical model for a multi-stage mixing process, discussing the effects of the opening size and topology on the density change of each layer, buoyancy driven flux through the opening and mixing efficiency. |