Relation between boundary slip mechanisms and water-like fluid behavior

Abstract

The slip of a fluid layer in contact with a solid confining surface is investigated for different temperatures and densities using molecular dynamic simulations. We show that for an anomalous water-like fluid the slip goes as follows: for low levels of shear, the defect slip appears and is related with the particle exchange between the fluid layers; at high levels of shear, the global slip occurs and is related to the homogeneous distribution of the fluid in the confining surfaces. The oscillations in the transition velocity from the defect to the global slip is shown to be associated with changes in the layering distribution in the anomalous fluid.

20 pages, 12 figures, accepted by Physical Review E in 27 february 2018