3D Instability of a Toroidal Flow in the Liquid Partially Covered by a Solid Film

The structure of a steady radial thermocapillary flow from the local heat source in cylindrical geometry has been studied numerically. up boundary liquid was partially covered by stationary film an insoluble surfactant, pushed to wall cavity. calculations are fulfilled on base interfacial hydrodynamics equations using mathematical package "Comsol Multiphysics". It is shown that effect symmetry breakdown appears as result convective instability, so initial poloidal rotation transforms into azimuthal plane. system inclined volumetric vortices formed under surfactant. inclination angle plane dependence intensity studied. vorticity can be regulated power point-heat and free surface area. increase heating leads growth vorticity. Thus, initially radially symmetric toroidal divided two parts with origination film.