Aspect ratio and radius ratio dependence of flow pattern driven by differential rotation of a cylindrical pool and a disk on the free surface
Aspect ratio and radius ratio dependence of flow pattern driven by differential rotation of a cylindrical pool and a disk on the free surface
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自由表面上圆柱池和圆盘差动旋转驱动流型的长宽比和半径比依赖性
DOI：
10.1063/1.4817179
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发表时间：
2013-08
影响因子：
4.6
通讯作者：
Ruan, Deng-Fang
中科院分区：
文献类型：
--
作者：
Wu, Chun-Mei;Li, You-Rong;Ruan, Deng-Fang
通过一系列非定常三维数值模拟，研究了圆柱池和圆盘在自由表面微分旋转驱动下流型的展弦比和半径比依赖关系。宽高比定义为池的高度与半径之比，范围为0.06 ~ 2.0，磁盘与圆柱形池的半径之比范围为0.15 ~ 0.9。池和磁盘的旋转雷诺数范围分别为0 ~ 4730和0 ~−5677，其中负号表示磁盘的旋转方向与圆柱形池相反。结果表明：射流的基本流动状态是轴对称的、稳定的，但在子午面有丰富的结构，这取决于径长比和半径比。随着旋转雷诺数的增加，流动过渡到三维振荡流动，其特征是速度波动波在不同位置沿逆时针或顺时针方向传播。
The aspect ratio and radius ratio dependence of the flow pattern driven by the differential rotation of a cylindrical pool and a disk on the free surface is investigated through a series of unsteady three-dimensional numerical simulations. The aspect ratio, which is defined as the height to the radius ratio of the pool, varies from 0.06 to 2.0 and the radius ratio of the disk to the cylindrical pool varies from 0.15 to 0.9. The rotation Reynolds numbers of the pool and disk range from 0 to 4730 and 0 to −5677, respectively, where the minus sign means the rotation direction of the disk is contrary to that of the cylindrical pool. The results show that the basic flow state is axisymmetric and steady but has rich structures at the meridian plane depending on the aspect and radius ratios. With the increase of the rotation Reynolds number, the flow transits to three-dimensional oscillatory flow, characterized by the velocity fluctuation waves traveling in the counter-clockwise or clockwise direction at differe...
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