Capillarity driven instability of a soft solid |
| |
Authors: | Mora Serge Phou Ty Fromental Jean-Marc Pismen Len M Pomeau Yves |
| |
Institution: | Laboratoire des Collo?des, Verres et Nanomatériaux, UMR 5587, Université Montpellier 2 and CNRS, Place Eugène Bataillon, F-34095 Montpellier Cedex, France. smora@univ-montp2.fr |
| |
Abstract: | We report the observation of a Plateau instability in a thin filament of solid gel with a very small elastic modulus. A longitudinal undulation of the surface of the cylinder reduces its area thereby triggering capillary instability, but is counterbalanced by elastic forces following the deformation. This competition leads to a nontrivial instability threshold for a solid cylinder. The ratio of surface tension to elastic modulus defines a characteristic length scale. The onset of linear instability is when the radius of the cylinder is one-sixth of this length scale, in agreement with theory presented here. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|