Faraday instability of superfluid surface.

Faraday instability of superfluid surface.
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DOI：
10.1103/physreve.76.046305
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发表时间：
2007-10
期刊：
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子：
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通讯作者：
H. Abe;T. Ueda;M. Morikawa;Y. Saitoh;R. Nomura;Y. Okuda
H. Abe;T. Ueda;M. Morikawa;Y. Saitoh;R. Nomura;Y. Okuda
中科院分区：
其他
文献类型：
--
作者：
H. Abe;T. Ueda;M. Morikawa;Y. Saitoh;R. Nomura;Y. Okuda

文献摘要

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我们观察到，当样品细胞垂直振动时，在超流体4He的自由表面上参数化地产生法拉第波。驻波模式出现在表面，其频率是驱动频率的一半。我们观察到明显的振动阈值的不稳定性。超流体和正常流体之间阈值的差异可以用壁面阻尼来解释。
We observed that Faraday waves are parametrically generated on a free surface of superfluid 4He when a sample cell is vibrated vertically. Standing-wave patterns appear on the surface, and their frequencies are one-half the driving frequency. We observed clear threshold amplitudes of the vibration for the instability. The difference in the threshold between the superfluid and the normal fluid is explained by a wall damping.