Surface switching of rotating fluid in a cylinder
Surface switching of rotating fluid in a cylinder
复制标题
DOI：
10.1063/1.2359740
复制
发表时间：
2006-10
影响因子：
4.6
通讯作者：
Toshiyuki Suzuki;M. Iima;Y. Hayase
中科院分区：
文献类型：
--
作者：
Toshiyuki Suzuki;M. Iima;Y. Hayase
我们研究了在底部不断旋转的驱动下开着的圆柱体中水的表面形状。在层流-湍流过渡的临界雷诺数附近，容器尺寸数量级的表面变形呈现出轴对称形状与非轴对称形状之间的非周期切换现象。当雷诺数小于开关区雷诺数时，轴对称形状为稳态；当雷诺数大于开关区雷诺数时，非轴对称形状为近似恒定角速度旋转的（准）周期状态。对表面形状的详细分析表明，非轴对称形状的流动是紊流。
We study the surface shape of water in an open cylinder driven by constant rotation of the bottom. Around the critical Reynolds number for the laminar-turbulent transition, the surface deformation, which is of the order of the container size, shows an aperiodic switching phenomenon between an axisymmetric shape and a nonaxisymmetric shape. The axisymmetric shape is observed as a steady state when the Reynolds number is smaller than that in the switching region, while the nonaxisymmetric shape is observed as a (quasi-) periodic state in which the surface rotates at almost constant angular velocity when the Reynolds number is larger than that in the switching region. A detailed analysis for the surface shape suggests that the flow with the nonaxisymmetric shape is turbulent.