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Elastocapillary levelling of thin viscous films on soft substrates
| Title: | Elastocapillary levelling of thin viscous films on soft substrates |
| Authors: | Rivetti, Marco Browse this author | | Bertin, Vincent Browse this author | | Salez, Thomas Browse this author | | Hui, Chung-Yuen Browse this author | | Linne, Christine Browse this author | | Arutkin, Maxence Browse this author | | Wu, Haibin Browse this author | | Raphaël, Elie Browse this author | | Bäumchen, Oliver Browse this author |
| Issue Date: | 1-Sep-2017 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review Fluids |
| Volume: | 2 |
| Start Page: | 094001-1 |
| End Page: | 094001-13 |
| Publisher DOI: | 10.1103/PhysRevFluids.2.094001 |
| Abstract: | A thin liquid film with nonzero curvature at its free surface spontaneously flows to reach a flat configuration, a process driven by Laplace pressure gradients and resisted by the liquid’s viscosity. Inspired by recent progresses on the dynamics of liquid droplets on soft substrates, we here study the relaxation of a viscous film supported by an elastic foundation. Experiments involve thin polymer films on elastomeric substrates, where the dynamics of the liquid-air interface is monitored using atomic force microscopy. A theoretical model that describes the coupled evolution of the solid-liquid and the liquid-air interfaces is also provided. In this soft-levelling configuration, Laplace pressure gradients not only drive the flow, but they also induce elastic deformations on the substrate that affect the flow and the shape of the liquid-air interface itself. This process represents an original example of elastocapillarity that is not mediated by the presence of a contact line. We discuss the impact of the elastic contribution on the levelling dynamics and show the departure from the classical self-similarities and power laws observed for capillary levelling on rigid substrates. |
| Rights: | ©2017 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/67782 |
| Appears in Collections: | 国際連携研究教育局 : GI-CoRE (Global Institution for Collaborative Research and Education : GI-CoRE) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: SALEZ THOMAS BLAISE
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