Wave turbulence on the surface of liquid hydrogen in restricted geometry: the influence of the boundary conditions

• Опубліковано в: : Физика низких температур
• Дата: 2015
• Автори: Brazhnikov, M.Yu., Levchenko, A.A., Mezhov-Deglin, L.P., Remizov, I.A.
• Формат: Стаття
• Мова: Англійська
• Опубліковано: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2015
• Теми: 10th International Conference on Cryocrystals and Quantum Crystals
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/127938
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Wave turbulence on the surface of liquid hydrogen in restricted geometry: the influence of the boundary conditions / M.Yu. Brazhnikov, A.A. Levchenko, L.P. Mezhov-Deglin, I.A. Remizov // Физика низких температур. — 2015. — Т. 41, № 6. — С. 615-619. — Бібліогр.: 12 назв. — англ.

Formation of low frequency harmonics on turbulent distribution in the system of waves on the surface of liquid
 hydrogen has been studied in the frequency range 1–100 Hz (capillary-gravity waves). It is shown that the
 geometry of the experimental cell has a significant influence on the direct cascade of capillary waves generated
 by monochromatic force as well as on the direction of the wave energy transfer from the range of pumping towards
 that of dissipation. Besides a direct turbulent cascade, single half-frequency harmonic generation was observed
 in a cylindrical cell under high pump power. In a square cell we observed not only a half-frequency harmonic
 but a number of low frequency harmonics below the driving frequency generated by the nonlinear threewave
 interaction. In the case of a rectangular cell we observed formation of incommensurate low frequency harmonics
 caused by the three-wave interaction of capillary waves and generation of a wave mode of ~1 Hz in the
 frequency range of gravity waves which could be attributed to the four-wave interaction.