Decay of vortex rings in a rotating fluid
Decay of vortex rings in a rotating fluid
复制标题
旋转流体中涡环的衰变
DOI：
10.1063/1.3117355
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发表时间：
2009
影响因子：
4.6
通讯作者：
P. Thomas
中科院分区：
文献类型：
--
作者：
M. Brend;P. Thomas
对旋转流体中沿着旋转轴向传播的涡环进行了实验研究。测量环在完全衰变之前所移动的长度xd。与基于泰勒-普劳德曼定理的理论论证一致，观察到xd的值随着Rossby数Ro的减小而减小。对于这里研究的参数范围，我们确定了平均衰减长度缩放的总体趋势，可以通过表达式（xd/D）<$=4.77 Ro1.06粗略总结，其中D是用于产生涡环的发生器喷嘴的直径。
Vortex rings propagating through a rotating fluid, along the axis of rotation, are studied experimentally. The length, xd, traveled by the rings until they have completely decayed is measured. In agreement with theoretical arguments based on the Taylor–Proudman theorem it is observed that the value of xd decreases with decreasing Rossby number, Ro. For the parameter range investigated here we determine an overall, global trend for the scaling of the mean decay length that can be roughly summarized by the expression (xd/D)¯=4.77 Ro1.06, where D is the diameter of the generator nozzle used to produce the vortex rings.