4 papers
Twisting and buckling: a new undulation mechanism for artificial swimmers
Ghani Oukhaled, Andrejs Cebers, Jean-Claude Bacri +2
We present an artificial swimmer consisting in a long cylinder of ferrogel which is polarized transversely and in opposite directions at each extremity. When it is placed on a wate…
Electrophoretic separation of large DNAs using steric confinement
Jérôme Mathé, Jean-Marc Di Meglio, Bernard Tinland
We report an alternative method for electrophoretic separation of large DNAs using steric confinement between solid walls, without gel or obstacles. The change of electrophoretic m…
Stick-slip instability for viscous fingering in a gel
N. Puff, G. Debregeas, J. -M. di Meglio +3
The growth dynamics of an air finger injected in a visco-elastic gel (a PVA/borax aqueous solution) is studied in a linear Hele-Shaw cell. Besides the standard Saffmann-Taylor inst…
Deformation and flow of a two-dimensional foam under continuous shear
Georges Debregeas, Herve Tabuteau, Jean-Marc di Meglio
We investigate the flow properties of a two-dimensional aqueous foam submitted to a quasistatic shear in a Couette geometry. A strong localization of the flow (shear banding) at th…