title: Interfacial roughening in nonideal fluids: dynamic scaling in the weak- and strong-damping regime.
abstract: Interfacial roughening denotes the nonequilibrium process by which an initially flat interface reaches its equilibrium state, characterized by the presence of thermally excited capillary waves. Roughening of fluid interfaces has been first analyzed by Flekkoy and Rothman [Phys. Rev. Lett. 75, 260 (1995)], where the dynamic scaling exponents in the weakly damped case in two dimensions were found to agree with the Kardar-Parisi-Zhang universality class. We extend this work by taking into account also the strong-damping regime and perform extensive fluctuating hydrodynamics simulations in two dimensions using the Lattice Boltzmann method. We show that the dynamic scaling behavior is different in the weakly and strongly damped case.
authors.affiliation: Interdisciplinary Centre for Advanced Materials Simulation (ICAMS), Ruhr-Universität Bochum, Universitätsstr. 90a, 44789 Bochum, Germany. markus.gross@rub.de
authors.forename: Markus
authors.initials: M
authors.lastname: Gross
authors.forename: Fathollah
authors.initials: F
authors.lastname: Varnik
mesh_terms: D003198:Computer Simulation; D008956:Models, Chemical; D008958:Models, Molecular; D017711:Nonlinear Dynamics; D012996:Solutions / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D012996:Solutions