Topologies of Nanoscale Droplets upon Head-On Collision from Large Molecular Dynamics Simulations.

The binary collision of nanoscale droplets is studied with molecular dynamics simulation for droplets consisting of up to 2 × 10 molecules interacting via a truncated and shifted form of the Lennard-Jones potential. Considering head-on collisions of droplets with a temperature near the triple point that occur in a saturated vapor of the same fluid, this work explores a range of collision topologies. Four droplet sizes, with a radius ranging from 30 to 120 molecule diameters, are simulated with a varying initial relative collision velocity, covering 36 cases in total.