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Loss of a fixed plane of symmetry in the wake of a sphere

机译:球面后失去固定的对称平面

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摘要

This paper reports about an experimental investigation of the loss of a fixed plane of symmetry in the wake of a sphere. The symmetry plane appears at the first bifurcation for the Reynolds number Re ≈ 212 and is preserved by a secondary Hopf bifurcation that sets in for Re ≈ 275. Upon increase of the Reynolds number the symmetry plane eventually breaks as a consequence of further transitions. The aim of this work is to look closer at the breaking of the planar symmetry of the wake and to establish its critical Reynolds number using a precise experimental technique. The experiments were carried out in a low velocity horizontal water channel for Reynolds numbers ranging from 270 to 500.
机译:本文报道了在球尾流中失去固定对称平面的实验研究。对称平面出现在雷诺数Re≈212的第一个分叉处,并由设置为Re≈275的次要Hopf分支保留。随着雷诺数的增加,对称面最终由于进一步的跃迁而破裂。这项工作的目的是更仔细地观察尾流的平面对称性,并使用精确的实验技术确定其临界雷诺数。实验是在低速水平水道中进行的,雷诺数范围为270至500。

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