Non-Equilibrium Injection Flow in a Nanometer Capillary Channel

Non-equilibrium molecular dynamics is applied to simulate liquid injection flow in a nanometer circular capillary. A full 12-6 Lennard-Jones potential, truncated at 2.2ó, was used to govern the liquid-liquid and liquid-solid interactions. Our results show that there exists an oscillatory distribution of liquid density in the normal wall direction. The solid-liquid energy scale has a strong influence on molecular motion in the first liquid layer near the solid substrate. Under the injection condition, liquid transport in a nanometer capillary was found to behave in an unexpected wavelike motion.