Multiphase static droplet simulations in hierarchically structured super-hydrophobic surfaces

Jung Shin Lee, Joon Sang Lee

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The surface of first part of study is textured with microscopic pillars of prototypical top geometries as a rectangle. The second one is textured with a hierarchical structure, composed of secondary pillar structures added on the primary texture. The length ratio between two scales of texture is 1:16. We evaluated the non-wetting characteristics of two types of surfaces by measuring CAs as well as the transition from the Wenzel’s to Cassie’s regimes. We measure the Contact angles (CAs), using the Lattice Boltzmann model (LBM), for two different surface configurations. We evaluated the effect of the hierarchical structure; the robustness of the Cassie regime is enhanced and the apparent contact angle is increased by the secondary structures. This is achieved by increasing the energy barrier against the transition between wetting and non-wetting regimes.

Original languageEnglish
Pages (from-to)3741-3747
Number of pages7
JournalJournal of Mechanical Science and Technology
Volume30
Issue number8
DOIs
Publication statusPublished - 2016 Aug 1

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All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

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