Excitation of Vortex Flows on the Free Surface of a Liquid by a Vibrating Plate

Abstract

The surface flows of a liquid in the presence of a partially submerged vibrating plate are investigated. In the case of low-frequency plate vibrations, two vortices are formed on the surface of the liquid on each side of the plate in which liquid particles move away from plate surfaces. Under parametric excitation of transverse capillary waves near the boundary of the liquid layer wetting the plate surface, the flow direction in vortices becomes opposite. High-frequency vibrations of the plate create additional secondary vortices on the liquid surface.