5713 Time evolution analyses of ultra-thin liquid film surface using long wave equation : Surface flow simulation for various initial configuration

Abstract

To examine behaviors and instabilities of ultra-thin but continuum liquid films, the long wave theory was employed, which is the time-evolution equation for the shape of the thin liquid film and includes surface tensions and surface forces such as the van der Waals (vdW) forces. The lubricant becomes dynamically unstable due to the attractive force from the upper solid or repulsive force of polar component. In this report, the time-evolution of the surface rise to the upper solid for non-polar liquid and the deformation from the liquid step to a terrace shape for polar liquid were numerically analyzed.