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“School of Physic”

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Paper   IPM / Physic / 6828
School of Physics
  Title:   Relaxtion of A Moving Contact Line and the Landau-Levich Effect
  Author(s): 
1.  R. Golestanian
2.  E. Raphael
  Status:   Published
  Journal: Europhys. Lett.
  No.:  15
  Vol.:  55
  Year:  2001
  Pages:   228-234
  Supported by:  IPM
  Abstract:
The dynamics of the deformations of a moving contact line is formulated. It is shown that an advancing contact line relaxes more quickly as compared to the equilibrium case, while for a receding contact line there is a corresponding slowing down. For a receding contact line on a heterogeneous solid surface, it is found that a roughening transition takes place which formally corresponds to the onset of leaving a Landau-Levich film. We propose a phase diagram for the system in which the phase boundaries corresponding to the roughening transition and the depinning transition meet at a junction point, and suggest that for sufficiently strong disorder a receding contact line will leave a Landau-Levich film immediately after depinning.

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