Effect of dispersion forces on the capillary-wave fluctuations of liquid surfaces.
We present molecular dynamics evidence for the nonanalytic effects of the long-range dispersion forces on the capillary waves fluctuations of a Lennard-Jones liquid surface. The results of the intrinsic sampling method, for the analysis of the instantaneous interfacial shape, are obtained in large systems for several cut-off distances of the potential tail, and they show good agreement with the theoretical prediction by Napiórkowski and Dietrich, based on a density functional analysis. The enhancement of the capillary waves is quantified to be within 1% for a simple liquid near its triple point.
Instituto de Ciencia de Materiales de Madrid, CSIC, 28049 Madrid, Spain and Instituto de Ciencia de Materiales Nicolás Cabrera.
Enrique
E
Chacón
Instituto de Ciencia de Materiales de Madrid, CSIC, 28049 Madrid, Spain and Departamento de Física Fundamental, Universidad Nacional de Educación a Distancia, 28080 Madrid, Spain.
Eva M
EM
Fernández
Instituto de Ciencia de Materiales Nicolás Cabrera and Departamento de Física Teórica de la Materia Condensada, Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain.
Pedro
P
Tarazona