Wave turbulence on the surface of a ferrofluid submitted to a magnetic field

Details Wave turbulence on the surface of a ferrofluid submitted to a magnetic field Wave turbulence on the surface of a ferrofluid submitted to a magnetic field

2008-11-12

arxiv.org/abs/0811.1943v1

Physical Review Letters 101 (2008) 244502

Physics

Classical Physics

Scientific paper

10.1103/PhysRevLett.101.244502

We report the observation of wave turbulence on the surface of a ferrofluid mechanically forced and submitted to a static normal magnetic field. We show that magnetic surface waves arise only above a critical field. The power spectrum of their amplitudes displays a frequency-power law leading to the observation of a magnetic wave turbulence regime which is experimentally shown to involve a 4-wave interaction process. The existence of the regimes of gravity, magnetic and capillary wave turbulence is reported in the phase space parameters as well as a triple point of coexistence of these three regimes. Most of these features are understood using dimensional analysis or the dispersion relation of the ferrohydrodynamics surface waves.

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