Наукова електронна бібліотека
періодичних видань НАН України
періодичних видань НАН України
Observation of acoustic turbulence in a system of nonlinear second sound waves in superfluid ⁴He
Репозиторій DSpace/Manakin
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Observation of acoustic turbulence in a system of nonlinear second sound waves in superfluid ⁴He
Тема:
Жидкий гелий
Інший ID:
PACS: 67.25.dg;67.25.dt;47.27.Cn;05.20.Dd
Посилання:
Observation of acoustic turbulence in a system of
nonlinear second sound waves in superfluid ⁴He
/ A.N. Ganshin, V.B. Efimov, G.V. Kolmakov, P.V.E. McClintock, L.P. Mezhov-Deglin
// Физика низких температур. — 2008. — Т. 34, № 4-5. — С. 367–372. — Бібліогр.: 24 назв. — англ.
Підтримка:
The investigations were supported by the Russian Foundation for Basic Research, project Nos. 06-02-17253 and 07-02-00728, by the Presidium of the Russian Academy of Sciences in frames of the programs «Quantum Macrophysics» and «Mathematical Methods in Nonlinear Dynamics», and by the Engineering and Physical Sciences Research Council (UK).
Дата:
2008
Переглядів:
1118
Завантажень:
599
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.
