Quantum turbulence in a propagating superfluid vortex front.
Quantum turbulence in a propagating superfluid vortex front.
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传播的超流体涡旋前沿中的量子湍流。
DOI：
10.1103/physrevlett.99.265301
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发表时间：
2007
影响因子：
8.6
通讯作者：
Eltsov VB
中科院分区：
文献类型：
--
作者：
Eltsov VB
我们目前的实验，数值和理论研究的涡前传播到一个区域的无涡流动的旋转超流体。我们表明，随着温度的降低，从层流通过准经典湍流量子湍流的前面的性质的变化。我们的实验提供了第一个直接测量的耗散率在湍流涡旋动力学的，并表明，耗散成为相互摩擦独立的温度降低，它被强烈抑制时，开尔文波级联涡线预测参与湍流能量传递到较小的长度尺度。
We present experimental, numerical, and theoretical studies of a vortex front propagating into a region of vortex-free flow of rotating superfluid. We show that the nature of the front changes from laminar through quasiclassical turbulent to quantum turbulent with decreasing temperature. Our experiment provides the first direct measurement of the dissipation rate in turbulent vortex dynamics ofand demonstrates that the dissipation becomes mutual-friction independent with decreasing temperature, and it is strongly suppressed when the Kelvin-wave cascade on vortex lines is predicted to be involved in the turbulent energy transfer to smaller length scales.