Author: Sebilleau J. Lebon L. Limat L. Quartier L. Receveur M.
Publisher: Edp Sciences
E-ISSN: 1286-4854|92|1|14003-14003
ISSN: 0295-5075
Source: EPL (EUROPHYSICS LETTERS), Vol.92, Iss.1, 2010-10, pp. : 14003-14003
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
We investigate the shape and dynamics of a floating viscous sheet formed by a jet falling on a static or moving bath under partial wetting conditions. For a static bath, the viscous sheet has a circular shape and spreads with a uniform thickness that is surprisingly larger than the static Langmuir equilibrium thickness. This thickening effect seems to be linked to a peculiarity of the oil used for the bath, which is in situation of total wetting on the sheet surface, and climbs the sheet a bit like a macroscopic “precursor film” that increases dissipation at the sheet perimeter. For a moving bath, the viscous sheet evolves from an ellipse to a ribbon, a transient remarkable pear shape being observed between these two states. A simple kinematic model of advection of the spreading sheet by the bath predicts very well the characteristics of the ribbon regime. Convected sheets whose shape is reminiscent of pendant drops in 2D are also observed at higher bath velocity, with interesting pinch off phenomena.
Related content
Shapes of hanging viscous filaments
EPL (EUROPHYSICS LETTERS), Vol. 84, Iss. 5, 2008-12 ,pp. :
Raman band shapes and the dynamics of liquid N 2 O 4
Molecular Physics, Vol. 66, Iss. 6, 1989-04 ,pp. :
Dynamics of spreading of a liquid drop across a surface chemical discontinuity
Journal de Physique II, Vol. 1, Iss. 1, 1991-01 ,pp. :
Disease spreading in populations of moving agents
EPL (EUROPHYSICS LETTERS), Vol. 82, Iss. 3, 2008-05 ,pp. :