Critical behavior of steady quantum turbulence generated by oscillating structures in superfluid 4He

被引：30

作者：

Yano, H. ^{[1
]}

Nago, Y. ^{[1
]}

Goto, R. ^{[1
]}

Obara, K. ^{[1
]}

Ishikawa, O. ^{[1
]}

Hata, T. ^{[1
]}

机构：

[1] Osaka City Univ, Grad Sch Sci, Osaka 5588585, Japan

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 22期

关键词：

TRANSITION; LAMINAR; DRAG;

D O I：

10.1103/PhysRevB.81.220507

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the critical behavior of steady quantum turbulence in superfluid He-4. By using a thin vibrating wire with no bridge vortices in the superfluid, we find that lifetime of turbulent state for a given driving force reveals an exponential distribution. The mean lifetime estimated from the distribution decreases exponentially but greatly below a critical injection power. We estimate the vortex line density in the turbulent state and find that this critical behavior arises when the interdistance between vortex lines becomes as large as the turbulent region.

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页数：4

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