Velocity Statistics Distinguish Quantum Turbulence from Classical Turbulence

被引：167
|
作者：
Paoletti, M. S. [1 ,2 ]
Fisher, Michael E. [3 ]
Sreenivasan, K. R. [3 ,4 ]
Lathrop, D. P. [1 ,2 ,3 ]
机构：
[1] Univ Maryland, Dept Phys, Dept Geol, College Pk, MD 20742 USA
[2] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA
[3] Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA
[4] Abdus Salaam Int Ctr Theoret Phys, I-34014 Trieste, Italy
来源：
PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 15期
关键词：
D O I：
10.1103/PhysRevLett.101.154501
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
By analyzing trajectories of solid hydrogen tracers, we find that the distributions of velocity in decaying quantum turbulence in superfluid He-4 are strongly non-Gaussian with 1/v(3) power-law tails. These features differ from the near-Gaussian statistics of homogenous and isotropic turbulence of classical fluids. We examine the dynamics of many events of reconnection between quantized vortices and show by simple scaling arguments that they produce the observed power-law tails.
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页数：4
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