Sliding of liquid droplets on thin viscoelastic soft layers
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912333992820736 |
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| author | Zhao, Menghua Dervaux, Julien Narita, Tetsuharu Lequeux, François Limat, Laurent Roché, Matthieu |
| author_facet | Zhao, Menghua Dervaux, Julien Narita, Tetsuharu Lequeux, François Limat, Laurent Roché, Matthieu |
| contents | Soft substrates are deformed by liquid-vapor surface tension upon contact with liquid droplets, forming the well-known wetting ridge. This ridge dynamically propagates with the moving contact line and critically influences liquid spreading. Here, we experimentally investigate gravity-driven sliding dynamics of water droplets on vertically tilted silicone layers whose viscoleasticity is characterized by the Chasset-Thirion model with the exponent m. At low Bond numbers, the sliding velocity scales with droplet size as V S $\sim$ D 2 m . While in the thin-film limit, velocity exhibits a pronounced power-law dependence on nominal substrate thickness, V S $\sim$ $Π$(h) -1 m . We rationalize these observations by quantifying viscoelastic dissipation within the soft layer and balancing it against the gravitational driving force using an energy-conservation framework. Our findings offer novel avenues for designing advanced soft coatings, anti-fouling and self-cleaning surfaces, and biomedical devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_13473 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Sliding of liquid droplets on thin viscoelastic soft layers Zhao, Menghua Dervaux, Julien Narita, Tetsuharu Lequeux, François Limat, Laurent Roché, Matthieu Soft Condensed Matter Soft substrates are deformed by liquid-vapor surface tension upon contact with liquid droplets, forming the well-known wetting ridge. This ridge dynamically propagates with the moving contact line and critically influences liquid spreading. Here, we experimentally investigate gravity-driven sliding dynamics of water droplets on vertically tilted silicone layers whose viscoleasticity is characterized by the Chasset-Thirion model with the exponent m. At low Bond numbers, the sliding velocity scales with droplet size as V S $\sim$ D 2 m . While in the thin-film limit, velocity exhibits a pronounced power-law dependence on nominal substrate thickness, V S $\sim$ $Π$(h) -1 m . We rationalize these observations by quantifying viscoelastic dissipation within the soft layer and balancing it against the gravitational driving force using an energy-conservation framework. Our findings offer novel avenues for designing advanced soft coatings, anti-fouling and self-cleaning surfaces, and biomedical devices. |
| title | Sliding of liquid droplets on thin viscoelastic soft layers |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2504.13473 |