| Abstract: | The present paper deals with the investigation of thermocapillary and natural convection by applying a white light-sheet technique for the simultaneous determination of the velocity and the temperature field. The oscillatory Marangoni convection has been visualized with differential interferometry. Streamlines, velocity profiles and isotherms are presented and discussed. A complete separation of a surface tension driven convection roll of hot fluid in the boundary layer and a buoyancy driven convection roll of colder fluid in the liquid volume was discovered. For large driving forces (large Marangoni number) inertia becomes effective and the interface becomes the source of localized eruptions. |
