title: Oscillatory Rayleigh-Marangoni convection in a layer heated from above: numerical simulations with an undeformable free surface.
abstract: Joint action of buoyancy and thermocapillary forces can destabilize the motionless state in a liquid layer heated from above due to the coupling of internal and surface waves. The nonlinear evolution of this oscillatory instability is studied using three-dimensional direct numerical simulations with a pseudospectral Fourier-Chebyshev code. Alternating rolls and standing, oscillating squares are observed as final convective patterns. The flow is strongly localized near the free surface. Buoyancy plays a negligible role in kinetic energy production.
authors.affiliation: Laboratoire de Modélisation en Mécanique, Université Pierre et Marie Curie (Paris VI), 8 rue du Capitaine Scott, 75015 Paris, France.
authors.forename: Thomas
authors.initials: T
authors.lastname: Boeck
authors.forename: Matthias
authors.initials: M
authors.lastname: Jurgk
authors.forename: Ute
authors.initials: U
authors.lastname: Bahr