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Journal Article

Moving contact lines on heterogeneous substrates


Golestanian,  R.       
Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Golestanian, R. (2004). Moving contact lines on heterogeneous substrates. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 362(1821), 1613-1623. doi:10.1098/rsta.2004.1406.

Cite as: https://hdl.handle.net/21.11116/0000-0001-AC1B-0
The dynamics of the deformations of a moving contact line on a disordered sub-strate are formulated, taking a proper account of the various interfacial forces as well as the dissipation mechanisms. Prompted by the results from dynamical renormalization group calculations, it is suggested that the coating transition in contact lines receding at relatively high velocities can be understood as a roughening transition in the contact line. A phase diagram is proposed for the system in which the phase boundaries corresponding to the coating transition and the pinning 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 de-pinning.