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Article Dans Une Revue Soft Matter Année : 2024

Morphology and stability of droplets sliding on soft viscoelastic substrates

Mathieu Oléron
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Laurent Limat
Matthieu Roché

Résumé

We show that energy dissipation partition between a liquid and a solid controls the shape and stability of droplets sliding on viscoelastic gels. When both phases dissipate energy equally, droplet dynamics is similar to that on rigid solids. When only the solid dissipate, we observe an apparent contact angle hysteresis, of viscoelastic origin. We find excellent agreement between our data and a non-linear model of the wetting of gels of our own that also indicates the presence of significant slip. Our work opens general questions on the dynamics of curved contact lines on compliant substrates.
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Dates et versions

hal-04064658 , version 1 (11-04-2023)
hal-04064658 , version 2 (28-04-2023)
hal-04064658 , version 3 (10-11-2023)
hal-04064658 , version 4 (05-12-2023)

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Mathieu Oléron, Laurent Limat, Julien Dervaux, Matthieu Roché. Morphology and stability of droplets sliding on soft viscoelastic substrates. Soft Matter, 2024, ⟨10.1039/D3SM01197F⟩. ⟨hal-04064658v4⟩
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