https://doi.org/10.1140/epjst/e2016-60208-0
Regular Article
Vertical vibration effect on the Rayleigh-Benard-Marangoni instability in a two-layer system of fluids with deformable interface
1 Institute of Continuous Media Mechanics UB RAS, 1, Koroleva Str., 614013, Perm, Russia
2 Perm State University, 15, Bukireva Str., 614990, Perm, Russia
a e-mail: lubimova@psu.ru
Received: 30 June 2016
Revised: 11 September 2016
Published online: 2 May 2017
The effect of vertical vibrations on the Rayleigh-Benard-Marangoni instability of a two-layer system of immiscible incompressible viscous fluids subjected to a constant vertical heat flux at the external boundaries is studied in the framework of the generalized Boussinesq approximation taking into account the interface deformations. The study is performed using the averaging approach under the assumption that the vibration period is small in comparison with the hydrodynamical time scales and the product of the vibration amplitude and the Boussinesq parameter is small in comparison with the layer thickness. It has been found that the long-wave instability is not affected by vibrations of small and moderate intensity. It turned out that vibrations have a stabilizing effect on the finite-wavelength perturbations in a wide range of parameters.
© EDP Sciences, Springer-Verlag, 2017
