Molecular Dynamics Simulation of Droplet Impact on Nanopillar Surface

The precision of many outdoor piezoelectric devices, such as aircraft and wind turbine surface piezoelectric sensors, may suffer significantly if the surface is dirty. To boost superhydrophobic properties, one typical way is to modify the device’s surface using nanostructures. But external stress and pinning effects may impair the properties of nanostructures. So attaining a cognitive breakthrough will require researching the dynamic wetting behavior of droplets on the surface at the nanoscale scale. Modeling droplet impact behavior gives the effects of velocity and nanostructure height on the wetting of droplets on the column surface. The deeper the surface potential well, the longer the contact time and retraction time, and the more likely the droplets spread. The critical velocity of the droplet wetting surface increases as the height of nanopillars increases, as does the surface roughness. The findings have implications for controlling surface anti-wettability and improving surface anti-fouling and anti-adhesion properties.