Modelling droplets on superhydrophobic surfaces: equilibrium states and transitions

Details Modelling droplets on superhydrophobic surfaces: equilibrium states and transitions Modelling droplets on superhydrophobic surfaces: equilibrium states and transitions

2005-04-11

arxiv.org/abs/cond-mat/0504248v1

Langmuir, 21, 2624-2629, 2005

Physics

Condensed Matter

Soft Condensed Matter

17 pages, 6 figures. Accepted for publication in Langmuir

Scientific paper

10.1021/la047348i

We present a lattice Boltzmann solution of the equations of motion describing the spreading of droplets on topologically patterned substrates. We apply it to model superhydrophobic behaviour on surfaces covered by an array of micron-scale posts. We find that the patterning results in a substantial increase in contact angle, from $110^o$ to $156^o$. The dynamics of the transition from drops suspended on top of the posts to drops collapsed in the grooves is described.

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