Thursday, November 17, 2005, 1:30 pm — Small Seminar Room, Bldg. 510
Developing nano-technologies require an ability to manipulate small bodies of fluids, but conventional pipes and tubing are inconvenient at nanometer scales. We explore the use of open flows on "chemical channels" - completely
wetting patterns of solid on a substrate, sandwiched between nonwetting regions. Even very thick ridges of incompressible liquid are found to flow continuously along straight linear channels, despite the development of shape inhomogeneities due to hydrodynamic pearling instabilities.
Molecular dynamics simulations, a simple long-wavelength approximation, and a full stability analysis based on the Stokes equations give qualitatively consistent results. Preliminary studies of flow in patterned junctions also
exhibit continuous transport, along with spontaneous symmetry breaking and unusual switching phenomena.
Hosted by: Antonio Checco
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