Capillary turbulence on the surface of normal and superfluid 4He

The capillary turbulence on the surface of liquid helium with excitation of surface waves by a harmonic force at low frequency omega(p) is investigated. It is shown tor the first time that at the transition of helium out of the superfluid into the normal state the high-frequency edge omega(b) of the inertial interval shifts in the direction of low frequencies. The magnitude of the shift is described well on the basis of the theory of weak wave turbulence. In the superfluid state the relative width omega(b)/omega(p))p of the inertial interval, where a developed turbulent cascade is established, can reach two decades. (C) 2009 American Institute of Physics. [DOL 10.1063/1.3075936]