Observation of acoustic turbulence in a system of nonlinear second sound waves in superfluid He4 | Zendy

A. Ganshin | Zendy; P. V. E. McClintock | Zendy; В. Б. Ефимов | Zendy; G. V. Kolmakov | Zendy; L. P. MezhovDeglin | Zendy

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Observation of acoustic turbulence in a system of nonlinear second sound waves in superfluid He4

Author(s) -

A. Ganshin,

P. V. E. McClintock,

В. Б. Ефимов,

G. V. Kolmakov,

L. P. MezhovDeglin

Publication year - 2008

Publication title -

low temperature physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.356

H-Index - 43

eISSN - 1090-6517

pISSN - 1063-777X

DOI - 10.1063/1.2908894

Subject(s) - physics , amplitude , superfluidity , backflow , energy cascade , acoustics , acoustic wave , turbulence , cascade , superfluid helium 4 , second sound , resonator , instability , noise (video) , computational physics , mechanics , optics , condensed matter physics , sound (geography) , mechanical engineering , chemistry , engineering , chromatography , inlet , artificial intelligence , computer science , image (mathematics)

We discuss the results of recent studies of acoustic turbulence in a system of nonlinear second sound waves in a high-quality resonator filled with superfluid 4He. It was found that, when the driving amplitude was sufficiently increased, a steady-state direct wave cascade is formed involving a flux of energy towards high frequencies. The wave amplitude distribution follows a power law over a wide range of frequencies. Development of a decay instability at high driving amplitudes results in the formation of subharmonics of the driving frequency, and to a backflow of energy towards the low-frequency spectral domain, in addition to the direct cascade

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