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Article Dans Une Revue EPL - Europhysics Letters Année : 2009

Capillary wave turbulence on a spherical fluid surface in low gravity

Résumé

We report the observation of capillary wave turbulence on the surface of a fluid layer in a low-gravity environment. In such conditions, the fluid covers all the internal surface of the spherical container which is submitted to random forcing. The surface wave amplitude displays power-law spectrum over two decades in frequency, corresponding to wavelength from $mm$ to a few $cm$. This spectrum is found in roughly good agreement with wave turbulence theory. Such a large scale observation without gravity waves has never been reached during ground experiments. When the forcing is periodic, two-dimensional spherical patterns are observed on the fluid surface such as subharmonic stripes or hexagons with wavelength satisfying the capillary wave dispersion relation.
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Dates et versions

hal-00166875 , version 1 (10-08-2007)
hal-00166875 , version 2 (09-02-2009)

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Claudio Falcón, Eric Falcon, Umberto Bortolozzo, Stéphan Fauve. Capillary wave turbulence on a spherical fluid surface in low gravity. EPL - Europhysics Letters, 2009, 86 (1), pp.14002. ⟨10.1209/0295-5075/86/14002⟩. ⟨hal-00166875v2⟩
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