Pressure barrier of water using superhydrophobic surface and its application for a pressure relief valve

Abstract

In fluid systems, pressure relief devices are essential and there are various types of mechanical pressure relief devices. However, this mechanical pressure relief device involves inevitable problems such as corrosion and moving errors. in this research, by using varies types of hole on superhydrophobic surfaces that was fabricated with silica nanoparticles and PDMS, effects of pressure barrier and releasing behavior under hydraulic pressure were described. the pressure barrier induced by unique wetting mode on hydrophobic/superhydrophobic surfaces and the infiltration pressure is according to classical Young-Laplace equation. by using single hole, multiple holes and porous medium, an effect of number of holes to the pressure barrier was identified. Furthermore, through the computational fluid dynamics (CFD) simulations, the infiltration pressure verification and pressure releasing behavior on the pressure barrier were analyzed. the results can be applied to the novel type of pressure relief device using the pressure barrier.