Skip to Main content Skip to Navigation

Dissipation aux interfaces : caléfaction, sillages, filaments visqueux

Abstract : We investigate in several experiments the link between dissipation and deformable liquid interfaces. First, we study Leidenfrost drops moving on various substrates. Their movement can be either accelerated — on a ratchet-like substrate — or slowed down. The deceleration allows us to study different types of friction. On a smooth solid, the drag is very low and mainly due to the surrounding air. On a crenellated surface, it is a consequence of the liquid impacting the side of the squares. Last, a drop sliding on another liquid decelerates because of wave resistance arising from the wake it generates. In a second part, we characterize viscous threads deformations. Compression and torsion of the filaments result into viscous buckling, which we compare to elastic buckling. However, if the thread is not forced to move, the evolution of its shape comes out of a balance between viscous, gravity and capillary effects.
Complete list of metadata

Cited literature [88 references]  Display  Hide  Download
Contributor : Marie Le Merrer Connect in order to contact the contributor
Submitted on : Friday, November 19, 2010 - 4:05:01 PM
Last modification on : Friday, August 5, 2022 - 11:54:06 AM
Long-term archiving on: : Friday, October 26, 2012 - 4:10:14 PM


  • HAL Id : pastel-00537896, version 1


Marie Le Merrer. Dissipation aux interfaces : caléfaction, sillages, filaments visqueux. Matière Molle [cond-mat.soft]. Ecole Polytechnique X, 2010. Français. ⟨pastel-00537896⟩



Record views


Files downloads