| Wed December 20th 2017 13:30 – 14:30 ZH286 | Seminar | Recent Studies of Non-classical Rayleigh-Bénard Convection Ke-Qing Xia |
Details:In this talk, I will report some of our recent studies of turbulent Rayleigh-Bénard convection in non-classical configurations, geometries, and under external fields, or in multiphase fluids. These include RB convection with a stabilizing force, with the force provided by rotation, an external magnetic field, or geometrical confinement. In rotating RB convection, I will present our recent numerical studies of the structure and dynamics of vortex columns. The study reveals that globally the vortex columns exhibit clustered spatial structures, while locally their dynamics follows random Brownian motion. In an experiment conducted in an annulus RB convection cell in highly turbulent state, we show the existence of a global bifurcation and bistability that corresponding to transitions between large-scale flow structures. | ||
