Faraday waves revisited

Abstract eng:
We revisit the theoretical description of Faraday waves. We show that the relation of dispersion is not that of free unforced waves; the forcing amplitude and the viscosity play a significant role in the dispersion relation. We then determine the instability thresholds and the wavenumber selection in cases of both short and long waves. We also show that, depending on the depth, the instability leading to the formation can be either supercritical or subcritical, in agreement with experimental observations.

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