The Transition to Turbulent Drag for a Cylinder Oscillating in Superfluid 4He: A Comparison of Quantum and Classical Behavior
The Transition to Turbulent Drag for a Cylinder Oscillating in Superfluid 4He: A Comparison of Quantum and Classical Behavior
复制标题
超流体 4He 中圆柱振荡向湍流阻力的转变：量子行为与经典行为的比较
DOI：
10.1007/s10909-008-9858-7
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发表时间：
2009
影响因子：
2
通讯作者：
Bradley D
中科院分区：
文献类型：
--
作者：
Bradley D
我们在毫开尔文温度下测量了超氦中导线谐振器的阻力和惯性力。在低速时，谐振腔的特性决定了谐振腔的特性，而这些特性可以在真空中测量。随着速度的增加，我们看到一个急剧的过渡，对应于超流体中量子涡旋线引起的阻力和惯性力的突然出现。我们给出了超流体阻力和惯性力作为谐振器速度函数的详细测量结果。我们讨论了两种不同导线直径和不同谐振频率下的结果。我们将观察到的行为与在振荡的经典流体中测量到的圆柱体的行为进行比较和对比。
We have measured the drag and inertial forces on wire resonators in superfluid4He at millikelvin temperatures. At low velocities the behavior is dominated by the intrinsic properties of the resonators which can be measured in vacuum. On increasing velocity we see a sharp transition corresponding to the sudden appearance of drag and inertial forces arising from quantum vortex lines in the superfluid. We present detailed measurements of the superfluid drag and inertial forces as a function of the resonator velocity. We discuss results for two different wire diameters and for different resonant frequencies. We compare and contrast the observed behavior with that measured for cylinders in oscillating classical fluids.