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Brazilian Journal of Physics

, Volume 47, Issue 6, pp 672–677 | Cite as

Two-Dimensional Wetting Transition Modeling with the Potts Model

  • Daisiane M. Lopes
  • José C. M. Mombach
Statistical

Abstract

A droplet of a liquid deposited on a surface structured in pillars may have two states of wetting: (1) Cassie-Baxter (CB), the liquid remains on top of the pillars, also known as heterogeneous wetting, or (2) Wenzel, the liquid fills completely the cavities of the surface, also known as homogeneous wetting. Studies show that between these two states, there is an energy barrier that, when overcome, results in the transition of states. The transition can be achieved by changes in geometry parameters of the surface, by vibrations of the surface or by evaporation of the liquid. In this paper, we present a comparison of two-dimensional simulations of the Cassie-Wenzel transition on pillar-structured surfaces using the cellular Potts model (CPM) with studies performed by Shahraz et al. In our work, we determine a transition diagram by varying the surface parameters such as the interpillar distance (G) and the pillar height (H). Our results were compared to those obtained by Shahraz et al. obtaining good agreement.

Keywords

Wetting transition Cassie-Baxter state Wenzel state Potts model 

Notes

Acknowledgements

This work was partially supported by Conselho de Aperfeiçoamento de Pessoal do Ensino Superior (CAPES).

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Copyright information

© Sociedade Brasileira de Física 2017

Authors and Affiliations

  1. 1.Departamento de FísicaUniversidade Federal de Santa MariaSanta MariaBrazil

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