Morphology and stability of droplets sliding on soft viscoelastic substrates
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866929246806474752 |
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| author | Oléron, Mathieu Limat, Laurent Dervaux, Julien Roché, Matthieu |
| author_facet | Oléron, Mathieu Limat, Laurent Dervaux, Julien Roché, Matthieu |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2304_04925 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Morphology and stability of droplets sliding on soft viscoelastic substrates Oléron, Mathieu Limat, Laurent Dervaux, Julien Roché, Matthieu Soft Condensed Matter Materials Science Fluid Dynamics 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. |
| title | Morphology and stability of droplets sliding on soft viscoelastic substrates |
| topic | Soft Condensed Matter Materials Science Fluid Dynamics |
| url | https://arxiv.org/abs/2304.04925 |