In some cases water droplets can completely wet microstructured superhydrophobic surfaces. The dynamics of this rapid process is analyzed by ultrahigh-speed imaging. Depending on the scales of the microstructure, the wetting fronts propagate smoothly and circularly or-more interestingly-in a stepwise manner, leading to a growing square-shaped wetted area: entering a new row perpendicular to the direction of front propagation takes milliseconds, whereas once this has happened, the row itself fills in microseconds ("zipping"). Numerical simulations confirm this view and are in quantitative agreement with the experiments.

Sbragaglia, M., Peters, A., Pirat, C., Borkent, B., Lammertink, R., Wessling, M., et al. (2007). Spontaneous breakdown of superhydrophobicity. PHYSICAL REVIEW LETTERS, 99(15), 156001 [10.1103/PhysRevLett.99.156001].

Spontaneous breakdown of superhydrophobicity

SBRAGAGLIA, MAURO;
2007-01-01

Abstract

In some cases water droplets can completely wet microstructured superhydrophobic surfaces. The dynamics of this rapid process is analyzed by ultrahigh-speed imaging. Depending on the scales of the microstructure, the wetting fronts propagate smoothly and circularly or-more interestingly-in a stepwise manner, leading to a growing square-shaped wetted area: entering a new row perpendicular to the direction of front propagation takes milliseconds, whereas once this has happened, the row itself fills in microseconds ("zipping"). Numerical simulations confirm this view and are in quantitative agreement with the experiments.
2007
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/02 - FISICA TEORICA, MODELLI E METODI MATEMATICI
English
Sbragaglia, M., Peters, A., Pirat, C., Borkent, B., Lammertink, R., Wessling, M., et al. (2007). Spontaneous breakdown of superhydrophobicity. PHYSICAL REVIEW LETTERS, 99(15), 156001 [10.1103/PhysRevLett.99.156001].
Sbragaglia, M; Peters, A; Pirat, C; Borkent, B; Lammertink, R; Wessling, M; Lohse, D
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/174436
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