Hydrodynamic crossovers in surface-directed spinodal decomposition and surface enrichment
School of Physical Sciences, Jawaharlal Nehru University - New Delhi, 110067, India
2 Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur, Bangalore, 560064, India
Accepted: 22 November 2011
We present comprehensive molecular dynamics results for the kinetics of surface-directed spinodal decomposition and surface enrichment in binary mixtures at wetting surfaces. We study the surface morphology and the growth dynamics of the wetting and enrichment layers. The growth law for the thickness of these layers shows a crossover from a diffusive regime to a hydrodynamic regime. We provide phenomenological arguments to understand this crossover.
PACS: 64.60.Ht – Dynamic critical phenomena / 64.75.Cd – Phase equilibria of fluid mixtures, including gases, hydrates, etc. / 64.75.Gh – Phase separation and segregation in model systems (hard spheres, Lennard-Jones, etc.)
© EPLA, 2012