Anisotropic formation of quantum turbulence generated by a vibrating wire in superfluid 4He
Anisotropic formation of quantum turbulence generated by a vibrating wire in superfluid 4He
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超流 4He 中振弦产生的量子湍流的各向异性形成
DOI：
10.1007/s10909-016-1729-z
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发表时间：
2017
影响因子：
2
通讯作者：
and O. Ishikawa
中科院分区：
文献类型：
--
作者：
H. Yano;K. Ogawa;Y. Chiba;K. Obara;and O. Ishikawa
为了研究超流中量子湍流的形成，我们研究了由振动弦产生的湍流中直径大于38英寸的涡环的发射。涡流环从湍流区的排放率保持低，直到开始的高速率排放，这表明，由线联合收割机产生的一些涡线结合，形成一个涡流缠结，直到平衡之间的速度建立涡线与缠结和解离。在垂直和平行于振荡器振动方向的方向上，平衡湍流的形成时间分别与和成正比，表明湍流的形成是各向异性的。这是湍流的产生动力。这种功率依赖性可能与具有恒定能量通量的量子湍流的特性有关。
To investigate the formation of quantum turbulence in superfluid, we have studied the emission of vortex rings with a ring size of larger than 38in diameter from turbulence generated by a vibrating wire. The emission rate of vortex rings from a turbulent region remains low until the beginning of high-rate emissions, suggesting that some of the vortex lines produced by the wire combine to form a vortex tangle, until an equilibrium is established between the rate of vortex line combination with the tangle and dissociation. The formation times of equilibrium turbulence are proportional toandin the directions perpendicular and parallel to the vibrating direction of the generator, respectively, indicating the anisotropic formation of turbulence. Here,is the generation power of the turbulence. This power dependence may be associated with the characteristics of quantum turbulence with a constant energy flux.