Spatially-localized time dependent solutions including turbulence and their interactions in 2D Kolmogorov flow etc15 Tracking Number 304Presentation: Session: Instability and Transition 3 Room: Room A Session start: 10:30 Wed 26 Aug 2015 Yoshiki Hiruta hiruta@kyoryu.scphys.kyoto-u.ac.jp Affifliation: Division of physics and astronomy, graduate school of science, Kyoto university, Kyoto, Japan Toshiki Teramura teramura@kyoryu.scphys.kyoto-u.ac.jp Affifliation: Division of physics and astronomy, graduate school of science, Kyoto university, Kyoto, Japan Sadayoshi Toh toh@kyoryu.scphys.kyoto-u.ac.jp Affifliation: Division of physics and astronomy, graduate school of science, Kyoto university, Kyoto, Japan Topics: - Instability and transition, - Vortex dynamics and structure formation Abstract: In 2D Kolmogorov flow in small aspect ratio domains, spatially-localized solutions such as kink, traveling or time-dependent kink-antikink pars coexist. However, the conservation of the flow rate in the y direction strongly restrict combination of localized solutions and their positioning. We find that by adding a homogeneous flow U y their positioning is controlled and each of localized solutions including a spatially-localized chaos is isolated. Numerical results suggest that these isolated solutions can be elements constructing a whole flow. |