Observation of acoustic turbulence in a system of nonlinear second sound waves in superfluid 4He.

Ganshin, A. N. and Efimov, V. B. and Kolmakov, G. V. and McClintock, Peter V. E. and Mezhov-Deglin, L. P. (2008) Observation of acoustic turbulence in a system of nonlinear second sound waves in superfluid 4He. Low Temperature Physics, 34. pp. 288-292. ISSN 1090-6517

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Abstract

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.

Item Type:
Journal Article
Journal or Publication Title:
Low Temperature Physics
Additional Information:
©2008 American Institute of Physics The published version will not be available for download until some time next year.
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
22892
Deposited On:
06 Jan 2009 17:49
Refereed?:
Yes
Published?:
Published
Last Modified:
02 Aug 2020 00:39