Molecular dynamics studies of velocity slip phenomena in a nanochannel

Non-equilibrium MD simulations were employed to Xi'an Jiaotong University to investigate the velocity slip phenomena in Couette flow confined in a nanochannel. Velocity distributions and density profiles of confined fluid with different fluid-wall interactions and different temperatures are determined. The results show that slip behaviors are dependent on the fluid temperature and the attractive force strengths of fluid-wall interaction. For different attractive force strengths of fluid-wall interaction, the different influences of fluid temperature on the density profiles result in the different influences of fluid temperature on the velocity slip. Furthermore, the effect of wall velocity on the structure of confined fluid is related to the fluid-wall interaction.