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

Жидкий гелий

Автор(и)

  • A.N. Ganshin Department of Physics, Lancaster University, Lancaster, LA1 4YB, UK
  • V.B. Efimov Department of Physics, Lancaster University, Lancaster, LA1 4YB, UK
  • G.V. Kolmakov Department of Physics, Lancaster University, Lancaster, LA1 4YB, UK
  • P.V.E. McClintock Department of Physics, Lancaster University, Lancaster, LA1 4YB, UK
  • L.P. Mezhov-Deglin Institute of Solid State Physics RAS, Chernogolovka, Moscow region, 142432, Russia

DOI (Low Temperature Physics):


https://doi.org/10.1063/1.2908894

Ключові слова:

superfluid helium, second sound, acoustic turbulence, Kolmogorov spectrum.

Анотація

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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Опубліковано

2008-03-17

Як цитувати

(1)
A.N. Ganshin, V.B. Efimov, G.V. Kolmakov, P.V.E. McClintock, and L.P. Mezhov-Deglin, Observation of acoustic turbulence in a system of nonlinear second sound waves in superfluid 4He: Жидкий гелий, Low Temp. Phys. 34, (2008) [Fiz. Nizk. Temp. 34, 367-372, (2008)] DOI: https://doi.org/10.1063/1.2908894.

Номер

Том 34 № 4-5 (2008)

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