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   Accueil > Annuaire > C. Ruyer-Quil > resume-Dietze-141215

On the Kapitza instability and the generation of capillary waves

Georg Dietze (FAST)

The classical problem of a liquid film falling along a vertical wall due to the action of gravity is revisited. The free-surface of such a flow is typically deformed into a train of solitary pulses that consists of large asymmetric wave humps preceded by small precursory ripples, designated as "capillary waves". We set out to answer four fundamental questions: (i) By what mechanism do the precursory ripples form? (ii) How can they travel at the same celerity as the large-amplitude main humps? (iii) Why should they be designated as "capillary waves"? (iv) What determines their wavelength and number and why do they attenuate in space?

Dernière modification : November 20 2015, 09:51:25.