Experiments on wave turbulence: the evolution and growth of second sound acoustic turbulence in superfluid 4He confirm self-similarity

被引：9

作者：

Ganshin, A. N. ^{[1
,2
]}

Efimov, V. B. ^{[1
,3
]}

Kolmakov, G. V. ^{[1
,3
,4
]}

Mezhov-Deglin, L. P. ^{[3
]}

McClintock, P. V. E. ^{[1
]}

机构：

[1] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

[2] Cornell Univ, Lab Elementary Particle Phys, Ithaca, NY 14853 USA

[3] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow Region, Russia

[4] Univ Pittsburgh, Dept Chem & Petr Engn, Pittsburgh, PA 15261 USA

来源：

NEW JOURNAL OF PHYSICS | 2010年 / 12卷

基金：

英国工程与自然科学研究理事会; 俄罗斯基础研究基金会;

关键词：

CONDENSATION; PROPAGATION; VELOCITY; DYNAMICS;

D O I：

10.1088/1367-2630/12/8/083047

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report our experiments on the formation of second sound acoustic turbulence in superfluid He-4. The initial growth in spectral amplitude follows power laws that steepen rapidly with increasing harmonic number n, corresponding to a propagating front in frequency space. The lower growth exponents agree well with analytic predictions and numerical modeling. The observed increase in the formation delay with n validates the concept of self-similarity in the growth of wave turbulence.

引用

页数：10

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