Observation of an Inverse Energy Cascade in Developed Acoustic Turbulence in Superfluid Helium

Details Observation of an Inverse Energy Cascade in Developed Acoustic Turbulence in Superfluid Helium Observation of an Inverse Energy Cascade in Developed Acoustic Turbulence in Superfluid Helium

2009-01-27

arxiv.org/abs/0901.4353v1

Physical Review Letters 101, 065303 (2008)

Physics

Fluid Dynamics

4 pages, 5 figures. The final version just prior to publication

Scientific paper

10.1103/PhysRevLett.101.065303

We report observation of an inverse energy cascade in second sound acoustic
turbulence in He II. Its onset occurs above a critical driving energy and it is
accompanied by giant waves that constitute an acoustic analogue of the rogue
waves that occasionally appear on the surface of the ocean. The theory of the
phenomenon is developed and shown to be in good agreement with the experiments.

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