Molecular Dynamics Simulation of Nanoflow Inside Non-Smooth Pipe

This paper presents simulations of 3D nanoscale flow inside non-smooth pipe with molecular dynamics simulation method. For nanoscale flow problems the influence of non-smooth surface is very important. This work constructs a nanoscale pipe with non-smooth inside surface and analyzes the steady liquid flow in the non-smooth pipe. The distribution of density, temperature and flow velocity is studied. Lennard-Jones potential is used in the simulations. Differences are obvious between smooth and non-smooth solutions. The numerical results show that the non-smooth surface should be considered for many nanoscale flow problems. The results of this paper are helpful to analyze wetting and non-wetting phenomenon at a solid-fluid interface.