Liquid trains in a tube
Laboratoire de Physique de la Matière Condensée URA 792 du CNRS, Collège
75231 Paris Cedex 05, France
Accepted: 3 July 2000
Trains of juxtaposed drops in a tube are described and found to move spontaneously, in wetting conditions, because of their asymmetry. We focus on the coating properties of these devices, and show in particular that highly viscous species can be (self-) transported, thanks to the lubricating film left by the first drop. Different properties of these systems are finally displayed, which stress their versatility towards microfluidics applications.
PACS: 68.10.Cr – Surface energy (surface tension, interface tension, angle of contact, etc.) / 68.45.Gd – Wetting / 83.50.Lh – Interfacial and free surface flows; slip
© EDP Sciences, 2000