Ideal-gas DPD fluid Tunable-slip wall Effective Slippage on Superhydrophobic Trapezoidal Grooves

The design and fabrication of textured surfaces has received much attention during the past decade. In case of a hydrophobic texture a modified surface profile can lead to a very large contact angle, which induces exceptional wetting properties. A remarkable mobility of liquids on such SH surfaces is observed in the Cassie state, where the textures are filled with gas, which renders them “self-cleaning” and causes droplets to roll (rather than slide) under gravity and rebound (rather than spread) upon impact. Furthermore, SH heterogeneous surfaces in the Cassie state exhibit very low friction, and this drag reduction is associated with the large slippage of liquids.