Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Observation of acoustic turbulence in a system of nonlinear second sound waves in superfluid 4He.
AU - Ganshin, A. N.
AU - Efimov, V. B.
AU - Kolmakov, G. V.
AU - McClintock, Peter V. E.
AU - Mezhov-Deglin, L. P.
N1 - ©2008 American Institute of Physics The published version will not be available for download until some time next year.
PY - 2008
Y1 - 2008
N2 - 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.
AB - 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.
KW - Superfluid helium
KW - second sound
KW - acoustic turbulence
KW - Kolmogorov spectrum
U2 - 10.1063/1.2908894
DO - 10.1063/1.2908894
M3 - Journal article
VL - 34
SP - 288
EP - 292
JO - Low Temperature Physics
JF - Low Temperature Physics
SN - 1090-6517
ER -