Abstract
We present new experimental results for films driven by a thermal gradient with an opposing gravitational force. When the gravitational effect becomes non-negligible, the advancing front produces a very large capillary ridge which shows a remarkable tendency to remain stable. This phenomenon can be explained by new mathematical results for a lubrication model of the experiment. The advancing front evolves into an “undercompressive” capillary shock structure which is stable to contact line perturbations, unlike typical capillary ridges in driven film flows.
- Received 4 August 1998
DOI:https://doi.org/10.1103/PhysRevLett.81.5169
©1998 American Physical Society