The wetting properties of frosted glass

Frosted glass is a common, low cost material. Its roughness can be used to control how it wet by water. In this paper, the wetting properties of silicone oil and water are investigated. For oil, total since oleophilic character enhanced its roughness. Due remarkable optical frosted glass, spreading droplets on surface was recorded over three months. parahydrophilic because large contact angle hysteresis (up 80° ). The behaviour compared long piece inclined glass. trajectories (and spreading) were studied phenomenological laws deduced describe dependence droplet speed initial volume inclination. Such dependences at travel distances (100 times capillary length) rationalised with simple model that takes into account thickness wake. Moreover, we analysed flow inside wake sliding Suggestions given exploit drainage high within framework open microfluidics.