Vortex Line Density Fluctuations of Quantum Turbulence
Vortex Line Density Fluctuations of Quantum Turbulence
复制标题
DOI：
10.1007/s10909-009-9922-y
复制
发表时间：
2010-02
影响因子：
2
通讯作者：
S. Fujiyama;M. Tsubota
中科院分区：
文献类型：
--
作者：
S. Fujiyama;M. Tsubota
研究了超流3 He-B中振荡网格产生的量子湍流的涡线密度涨落。数值模拟结果证实了兰开斯特小组在实验上提出的量子湍流的设想。涡线密度波动的频谱与频率的关系服从−5/3幂律，这与兰开斯特小组的实验一致。从不同尺度涡环的时间尺度和功率谱的角度出发，讨论了涡缠结的自相似结构与功率谱之间的关系。
We investigate vortex line density fluctuations of quantum turbulence generated by an oscillating grid in superfluid3He-B. The scenario of quantum turbulence experimentally suggested by the Lancaster group is confirmed in the numerical simulation. The spectrum of the vortex line density fluctuations with respect to frequency obeyed a −5/3 power law, which is consistent with the experiment of the Lancaster group. Based on the argument of time scales experienced by vortex rings with different sizes and on the power spectrum, the connection between the self-similar structure of the vortex tangle and the power spectrum is discussed.