Turbulence generated by vibrating wire resonators in superfluid 4He at low temperatures
Turbulence generated by vibrating wire resonators in superfluid 4He at low temperatures
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DOI：
10.1007/s10909-005-2240-0
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发表时间：
2005-02-01
影响因子：
2
通讯作者：
Zaki, KL
中科院分区：
文献类型：
--
作者：
Bradley, DI;Clubb, DO;Zaki, KL
我们测量了毫开尔文温度下超流He-4中振弦谐振器的响应。我们发现的证据湍流产生的临界速度以上的顺序为几厘米/秒。在湍流开始的临界速度处，谐振器速度突然减小并显示滞后行为。令人惊讶的是，我们发现，谐振器的谐振频率增加的湍流制度。我们还发现，临界速度可能会减少由相邻的振动线谐振器产生的湍流的存在下，允许现有的湍流在低温制度的检测。
We have measured responses of vibrating wire resonators in superfluid He-4 at millikelvin temperatures. We find evidence for turbulence generation above a critical velocity on the order of a few cm/s. At the critical velocity for the onset of turbulence, the resonator velocity abruptly decreases and shows hysteretic behavior. Surprisingly we find that the resonant frequencies of the resonators increase in the turbulent regime. We also find that the critical velocity may be reduced by the presence of turbulence generated by a neighboring vibrating wire resonator, allowing the detection of existing turbulence in the low temperature regime.