Universal wrinkling dynamics of a sheet on viscous liquid
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866908772471930880 |
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| author | Draux, Ayrton Rizzo, Marco Vella, Dominic Démery, Vincent Brau, Fabian Damman, Pascal |
| author_facet | Draux, Ayrton Rizzo, Marco Vella, Dominic Démery, Vincent Brau, Fabian Damman, Pascal |
| contents | We investigate the wrinkling dynamics of a thin elastic sheet that is indented or compressed while floating on a viscous liquid. We show that the deformation speed controls the dynamics, leading to a wrinkle wavelength significantly smaller than that selected under quasistatic compression. Once active compression ceases, the wrinkles coarsen until their wavelength relaxes toward the equilibrium value. We develop a theoretical model coupling Stokes flow in the liquid to elastic bending of the sheet, which quantitatively predicts both the initial wavelength selection and its subsequent coarsening. We demonstrate that the same mechanism governs two dimensional and axisymmetric geometries, thereby extending classical static wavelength selection laws to dynamic situations. Although developed from controlled laboratory experiments, the model captures a generic viscous-elastic coupling and applies broadly to thin elastic films interacting with viscous environments, including the formation of surface wrinkles in pahoehoe lava flows. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_11682 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Universal wrinkling dynamics of a sheet on viscous liquid Draux, Ayrton Rizzo, Marco Vella, Dominic Démery, Vincent Brau, Fabian Damman, Pascal Soft Condensed Matter Materials Science Fluid Dynamics We investigate the wrinkling dynamics of a thin elastic sheet that is indented or compressed while floating on a viscous liquid. We show that the deformation speed controls the dynamics, leading to a wrinkle wavelength significantly smaller than that selected under quasistatic compression. Once active compression ceases, the wrinkles coarsen until their wavelength relaxes toward the equilibrium value. We develop a theoretical model coupling Stokes flow in the liquid to elastic bending of the sheet, which quantitatively predicts both the initial wavelength selection and its subsequent coarsening. We demonstrate that the same mechanism governs two dimensional and axisymmetric geometries, thereby extending classical static wavelength selection laws to dynamic situations. Although developed from controlled laboratory experiments, the model captures a generic viscous-elastic coupling and applies broadly to thin elastic films interacting with viscous environments, including the formation of surface wrinkles in pahoehoe lava flows. |
| title | Universal wrinkling dynamics of a sheet on viscous liquid |
| topic | Soft Condensed Matter Materials Science Fluid Dynamics |
| url | https://arxiv.org/abs/2601.11682 |