Abstract
In order to study the microstructure of oscillatory Marangoni convection, and to clarify the relation between the temperature fluctuation in the interior of the liquid bridge and that inside a solid/liquid boundary layer, Marangoni convection in a liquid bridge of silicone oil was observed during 6 minutes microgravity condition by TR-IA sounding rocket. The experimental results were compared with the unsteady numerical simulations. At the first stage with small temperature difference. laminar Marangoni convect10n was observed. At the second stage with large temperature difference, oscillatory Marangoni convection was observed. The amplitude of both velocity and temperature fluctuation increased as time passed. The frequency of these fluctuation was about O.lHz. The amplitude of temperature fluctuation was decreased inside a solid/liquid boundary layer.
