chaotic self-sustaining turbulent-laminar interface in two-dimensional channel flow etc15 Tracking Number 267Presentation: Session: Instability and Transition 3 Room: Room A Session start: 10:30 Wed 26 Aug 2015 Toshiki Teramura teramura@kyoryu.scphys.kyoto-u.ac.jp Affifliation: Graduate School of Science, Kyoto University, Japan Sadayoshi Toh toh@kyoryu.scphys.kyoto-u.ac.jp Affifliation: Graduate School of Science, Kyoto University, Japan Topics: - Instability and transition, - Vortex dynamics and structure formation, - Intermittency and scaling, - Wall bounded flows Abstract: Another type of self-sustainable coherent structures is found in a two-dimensional channel flow. It is embedded in a turbulent-laminar interface, so it utilizes the inhomogeneity to keep alive. Its spatio-temporally chaotic behavior and sustaining mechanism are investigated using the filtered simulation. This is an example of inhomogeneity induced coherent structures, which will be necessary to understand the spatio-temporal intermittency in three-dimensional turbulent systems. |