Thermosolutal Inducement of No-Slip Free Surfaces in Combined Marangoni-Buoyancy Driven Cavity Flows

The presence of a diffusing surfactant in combined surface tension-buoyancy driven convection is studied numerically to examine its influence on the flow structure and heat transfer characteristics of a fluid contained within a cavity. By accounting for the surface tension dependence on both temperature and surfactant concentration, the free surface may become stagnant. As a result, the high local and overall heat transfer rates at the cold wall, which are associated with thermal surface tension-augmented buoyancy driven flows, are decreased.