Experimental signature of quantum turbulence in velocity spectra?
Experimental signature of quantum turbulence in velocity spectra?
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DOI：
10.1088/1367-2630/abfe1f
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发表时间：
2021-06
影响因子：
3.3
通讯作者：
J. Salort;F. Chillà;E. Rusaouën;P. Roche;M. Gibert;I. Moukharski;A. Braslau;F. Daviaud;B. Gallet;E. Saw;B. Dubrulle;P. Diribarne;B. Rousset;M. B. Mardion;J. Moro;A. Girard;C. Baudet;V. L'vov;A. Golov;S. Nazarenko
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文献类型：
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作者：
J. Salort;F. Chillà;E. Rusaouën;P. Roche;M. Gibert;I. Moukharski;A. Braslau;F. Daviaud;B. Gallet;E. Saw;B. Dubrulle;P. Diribarne;B. Rousset;M. B. Mardion;J. Moro;A. Girard;C. Baudet;V. L'vov;A. Golov;S. Nazarenko
本文报道了同向旋转螺旋桨间湍流超流氦中的速度测量。选择的参数，使流动是完全湍流，其耗散尺度的速度传感器部分解决。这使得第一个实验比较光谱在量子与经典湍流耗散尺度的解决。在某些特定的条件下，观察到的差异，在量子的情况下，与经典的相比，在小尺度上的能量过剩。这种差异是一致的预测堆积的超流动能在底部的惯性级联的湍流，由于一个特定的耗散机制。
Velocity measurements in turbulent superfluid helium between co-rotating propellers are reported. The parameters are chosen such that the flow is fully turbulent, and its dissipative scales are partly resolved by the velocity sensors. This allows for the first experimental comparison of spectra in quantum versus classical turbulence where dissipative scales are resolved. In some specific conditions, differences are observed, with an excess of energy at small scales in the quantum case compared to the classical one. This difference is consistent with the prediction of a pileup of superfluid kinetic energy at the bottom of the inertial cascade of turbulence due to a specific dissipation mechanism.